My solutions to Leetcode Problems
- All are AC solutions
- Very few will have comments, because I wrote them for myself. But raise an issue if you want to understand more about a solution, and I will add an explanation
- There is a small chance that a handful of solutions are not mine, because I sometimes submit solutions that my students ask me to debug. Raise an issue and I will remove it
Thanks to world177/Leetcode-Downloader-for-Submissions for bulk download.
- Apply operations to make string empty
- Count the number of special characters ii
- Dota2 senate
- Maximum enemy forts that can be captured
- Maximum value of an ordered triplet i
- Maximum value of an ordered triplet ii
- Minimum operations to maximize last elements in arrays
- Minimum right shifts to sort the array
- Monotonic array
- Number of laser beams in a bank
- Remove colored pieces if both neighbors are the same color
- Separate black and white balls
- Smallest missing integer greater than sequential prefix sum
- Sum of absolute differences in a sorted array
- The employee that worked on the longest task
- Arithmetic slices
- Check if all 1s are at least length k places away
- Consecutive characters
- Count alternating subarrays
- Count binary substrings
- Count number of homogenous substrings
- Distribute candies
- Find all good indices
- Find if array can be sorted
- Find longest special substring that occurs thrice i
- Find longest special substring that occurs thrice ii
- Find the longest balanced substring of a binary string
- Invalid transactions
- Largest submatrix with rearrangements
- Length of the longest alphabetical continuous substring
- Longer contiguous segments of ones than zeros
- Longest alternating subarray
- Longest even odd subarray with threshold
- Longest mountain in array
- Longest non decreasing subarray from two arrays
- Longest subarray with maximum bitwise and
- Longest substring of all vowels in order
- Longest turbulent subarray
- Max consecutive ones
- Maximal rectangle
- Maximize area of square hole in grid
- Maximum ascending subarray sum
- Maximum product subarray
- Minimum cost to make all characters equal
- Minimum time to make rope colorful
- Number of zero filled subarrays
- Reduce array size to the half
- The number of weak characters in the game
- Beautiful towers ii
- Best time to buy and sell stock iii
- Candy
- Count palindromic subsequences
- Count the number of incremovable subarrays i
- Count the number of incremovable subarrays ii
- Find all good indices
- Find the distinct difference array
- Largest plus sign
- Left and right sum differences
- Maximize distance to closest person
- Maximize win from two segments
- Maximum building height
- Minimum average difference
- Minimum cost to make all characters equal
- Minimum cost to make array equal
- Minimum index of a valid split
- Minimum number of flips to make the binary string alternating
- Minimum remove to make valid parentheses
- Minimum sum of mountain triplets i
- Minimum sum of mountain triplets ii
- Partition array into disjoint intervals
- Product of array except self
- Subsequence with the minimum score
- Sum of distances
- Take k of each character from left and right
- Unique length 3 palindromic subsequences
- Duplicate zeros
- Find all duplicates in an array
- Merge sorted array
- Move zeroes
- Remove all adjacent duplicates in string
- Remove duplicates from sorted array
- Remove duplicates from sorted array ii
- Remove element
- Reverse vowels of a string
- Count the number of good partitions
- Count unique characters of all substrings of a given string
- Execution of all suffix instructions staying in a grid
- Largest substring between two equal characters
- Maximize the number of partitions after operations
- Number of subarrays with bounded maximum
- Number of ways to divide a long corridor
- Shortest subarray with or at least k i
- Shortest subarray with or at least k ii
- Split array into maximum number of subarrays
- Subarrays distinct element sum of squares i
- Subarrays distinct element sum of squares ii
- Substring with largest variance
- Ways to split array into good subarrays
- Execution of all suffix instructions staying in a grid
- Find the original array of prefix xor
- Jump game ii
- Jump game vi
- Largest element in an array after merge operations
- Largest odd number in string
- Longest binary subsequence less than or equal to k
- Maximize the number of partitions after operations
- Minimum operations to collect elements
- Minimum operations to make a special number
- Minimum replacements to sort the array
- Plus one
- Smallest subarrays with maximum bitwise or
- Solving questions with brainpower
- The number of weak characters in the game
- Using a robot to print the lexicographically smallest string
- Visit array positions to maximize score
- Average of levels in binary tree
- Count nodes equal to average of subtree
- Design underground system
- Find the grid of region average
- Finding mk average
- Minimum average difference
- All paths from source to target
- All possible full binary trees
- Beautiful arrangement
- Combination sum
- Combination sum iii
- Expression add operators
- Find the punishment number of an integer
- Generate parentheses
- Maximum number of groups getting fresh donuts
- Maximum score words formed by letters
- N queens
- Number of valid clock times
- Partition to k equal sum subsets
- Maximize value of function in a ball passing game
- Minimum edge weight equilibrium queries in a tree
- Prison cells after n days
- Binary search
- Capacity to ship packages within d days
- Construct binary search tree from preorder traversal
- Count subarrays with score less than k
- Data stream as disjoint intervals
- Design movie rental system
- Dungeon game
- Earliest second to mark indices i
- Earliest second to mark indices ii
- Find building where alice and bob can meet
- Find first and last position of element in sorted array
- Find in mountain array
- Find k closest elements
- Find right interval
- Find smallest letter greater than target
- Find the duplicate number
- Find the longest valid obstacle course at each position
- Find the maximum number of marked indices
- Find the smallest divisor given a threshold
- Find the sum of subsequence powers
- First bad version
- Guess number higher or lower
- H index
- H index ii
- House robber iv
- K th smallest prime fraction
- Koko eating bananas
- Kth smallest amount with single denomination combination
- Kth smallest element in a sorted matrix
- Kth smallest number in multiplication table
- Longest palindromic substring
- Longest subsequence with limited sum
- Maximize the minimum powered city
- Maximum distance between a pair of values
- Maximum number of alloys
- Maximum number of removable characters
- Maximum number of robots within budget
- Maximum running time of n computers
- Maximum tastiness of candy basket
- Maximum value at a given index in a bounded array
- Maximum xor of two numbers in an array
- Median of two sorted arrays
- Minimize maximum of array
- Minimize the maximum difference of pairs
- Minimum cost for tickets
- Minimum operations to make all array elements equal
- Minimum speed to arrive on time
- Minimum time to complete trips
- Minimum time to repair cars
- Nth magical number
- Partition array such that maximum difference is k
- Peak index in a mountain array
- Prime subtraction operation
- Split array largest sum
- 132 pattern
- Closest room
- Contains duplicate iii
- Count of range sum
- Maximum balanced subsequence sum
- Maximum number of points from grid queries
- Maximum sum queries
- Minimum absolute difference between elements with constraint
- Minimum absolute sum difference
- Minimum reverse operations
- My calendar i
- Online majority element in subarray
- Random pick with weight
- Random point in non overlapping rectangles
- Snapshot array
- Delivering boxes from storage to ports
- Max sum of rectangle no larger than k
- Random pick with weight
- Random point in non overlapping rectangles
- Apply bitwise operations to make strings equal
- Apply operations on array to maximize sum of squares
- Binary watch
- Bitwise and of numbers range
- Check if a string contains all binary codes of size k
- Check if bitwise or has trailing zeros
- Cinema seat allocation
- Complement of base 10 integer
- Concatenation of consecutive binary numbers
- Count pairs with xor in a range
- Counting bits
- Cycle length queries in a tree
- Determine if string halves are alike
- Divide two integers
- Find a good subset of the matrix
- Find a value of a mysterious function closest to target
- Find if array can be sorted
- Find the k or of an array
- Find xor sum of all pairs bitwise and
- Form smallest number from two digit arrays
- Gray code
- Hamming distance
- K th symbol in grammar
- Longest uncommon subsequence ii
- Maximum length of a concatenated string with unique characters
- Maximum number of achievable transfer requests
- Maximum or
- Maximum product of word lengths
- Maximum rows covered by columns
- Maximum strength of a group
- Maximum strong pair xor i
- Maximum strong pair xor ii
- Maximum xor after operations
- Maximum xor for each query
- Minimize xor
- Minimum flips to make a or b equal to c
- Minimum impossible or
- Minimum one bit operations to make integers zero
- Minimum operations to form subsequence with target sum
- Minimum operations to make the integer zero
- Minimum operations to reduce an integer to 0
- Minimum sum of values by dividing array
- Minimum xor sum of two arrays
- Missing number
- Non decreasing subsequences
- Non negative integers without consecutive ones
- Number complement
- Number of 1 bits
- Number of even and odd bits
- Number of excellent pairs
- Number of possible sets of closing branches
- Power of four
- Power of two
- Powx n
- Prison cells after n days
- Range product queries of powers
- Remove duplicate letters
- Remove invalid parentheses
- Score after flipping matrix
- Shortest path to get all keys
- Shortest subarray with or at least k i
- Shortest subarray with or at least k ii
- Smallest subarrays with maximum bitwise or
- Smallest sufficient team
- Special permutations
- Split array into maximum number of subarrays
- String compression ii
- Sum of values at indices with k set bits
- Unique length 3 palindromic subsequences
- Utf 8 validation
- Find xor beauty of array
- Maximum xor of two numbers in an array
- Minimize or of remaining elements using operations
- Minimum number of flips to convert binary matrix to zero matrix
- Bitwise xor of all pairings
- Count pairs of points with distance k
- Count paths that can form a palindrome in a tree
- Count the number of beautiful subarrays
- Find the maximum sum of node values
- Find the original array of prefix xor
- Maximum xor product
- Minimum number of operations to make array xor equal to k
- Neighboring bitwise xor
- Number of wonderful substrings
- Pseudo palindromic paths in a binary tree
- Substring xor queries
- Fair distribution of cookies
- Iterator for combination
- Longest uncommon subsequence ii
- Matchsticks to square
- Maximum length of a concatenated string with unique characters
- Maximum number of achievable transfer requests
- Maximum rows covered by columns
- Maximum strength of a group
- Minimum moves to spread stones over grid
- N queens
- N queens ii
- Non decreasing subsequences
- Number of possible sets of closing branches
- Permutations
- Probability of a two boxes having the same number of distinct balls
- Remove invalid parentheses
- Shortest string that contains three strings
- Kth smallest amount with single denomination combination
- Letter case permutation
- Letter combinations of a phone number
- Minimum number of flips to convert binary matrix to zero matrix
- Numbers with same consecutive differences
- All possible full binary trees
- Can make arithmetic progression from sequence
- Combinations
- Design parking system
- Longest arithmetic subsequence
- Longest arithmetic subsequence of given difference
- Maximum level sum of a binary tree
- Minimum ascii delete sum for two strings
- Minimum flips to make a or b equal to c
- Minimum size subarray sum
- Number of provinces
- Peak index in a mountain array
- Predict the winner
- Stone game iii
- Strange printer
- Time needed to inform all employees
- 3sum with multiplicity
- Determine if two strings are close
- Find all anagrams in a string
- Intersection of two arrays ii
- Largest palindromic number
- Longest palindrome
- Minimum penalty for a shop
- Construct quad tree
- Data stream as disjoint intervals
- Design a food rating system
- Design a number container system
- Design add and search words data structure
- Design authentication manager
- Design browser history
- Design circular queue
- Design hashmap
- Design hashset
- Design memory allocator
- Design movie rental system
- Design parking system
- Design underground system
- Encode and decode tinyurl
- Find consecutive integers from a data stream
- Frequency tracker
- Implement trie prefix tree
- Insert delete getrandom o1
- Iterator for combination
- Lfu cache
- Longest uploaded prefix
- Lru cache
- Maximum frequency stack
- Min stack
- Number of recent calls
- Online majority element in subarray
- Peeking iterator
- Random pick with weight
- Accounts merge
- Checking existence of edge length limited paths
- Find all people with secret
- Find critical and pseudo critical edges in minimum spanning tree
- Find the safest path in a grid
- Greatest common divisor traversal
- Largest component size by common factor
- Last day where you can still cross
- Lexicographically smallest equivalent string
- Maximum segment sum after removals
- Min cost to connect all points
- Minimum cost walk in weighted graph
- Number of good paths
- Number of islands
- Rank transform of a matrix
- Redundant connection
- Remove max number of edges to keep graph fully traversable
- Satisfiability of equality equations
- Similar string groups
- Sum of subarray minimums
- Arithmetic slices ii subsequence
- Beautiful towers ii
- Best team with no conflicts
- Best time to buy and sell stock iii
- Best time to buy and sell stock with cooldown
- Binary trees with factors
- Burst balloons
- Cheapest flights within k stops
- Check if it is possible to split array
- Check if there is a valid partition for the array
- Climbing stairs
- Concatenated words
- Count number of ways to place houses
- Count palindromic subsequences
- Count square submatrices with all ones
- Count unique characters of all substrings of a given string
- Count vowels permutation
- Count ways to build good strings
- Decode ways
- Decode ways ii
- Delete and earn
- Domino and tromino tiling
- Edit distance
- Extra characters in a string
- Fibonacci number
- Find all possible stable binary arrays i
- Find all possible stable binary arrays ii
- Frog jump
- House robber
- Jump game
- Jump game ii
- Longest arithmetic subsequence
- Longest arithmetic subsequence of given difference
- Longest string chain
- Longest unequal adjacent groups subsequence i
- Maximize the number of partitions after operations
- Maximum alternating subsequence sum
- Maximum balanced subsequence sum
- Maximum deletions on a string
- Maximum number of jumps to reach the last index
- Maximum strictly increasing cells in a matrix
- Min cost climbing stairs
- Minimum cost for tickets
- Minimum cost to convert string ii
- Minimum cost to cut a stick
- Minimum cost to make all characters equal
- Minimum cost to make array equal
- Minimum cost to split an array
- Minimum difficulty of a job schedule
- Minimum increment operations to make array beautiful
- Minimum penalty for a shop
- Minimum sideway jumps
- Minimum time to remove all cars containing illegal goods
- New 21 game
- Number of distinct roll sequences
- Number of music playlists
- Number of ways to rearrange sticks with k sticks visible
- Number of ways to reorder array to get same bst
- Paint house iii
- Palindrome partitioning ii
- Palindrome partitioning iii
- Palindrome partitioning iv
- Partition array for maximum sum
- Partition string into substrings with values at most k
- Pascals triangle
- Remove boxes
- Restore ip addresses
- Restore the array
- Solving questions with brainpower
- Sorting three groups
- Soup servings
- Split array into maximum number of subarrays
- Stone game iii
- Strange printer
- The number of beautiful subsets
- Ways to express an integer as sum of powers
- Champagne tower
- Cherry pickup ii
- Coin change
- Coin change 2
- Decremental string concatenation
- Delete operation for two strings
- Distinct subsequences
- Find the sum of subsequence powers
- Find the sum of the power of all subsequences
- Freedom trail
- Interleaving string
- K inverse pairs array
- Knight dialer
- Length of the longest subsequence that sums to target
- Longest binary subsequence less than or equal to k
- Longest ideal subsequence
- Longest palindromic subsequence
- Make array strictly increasing
- Maximize consecutive elements in an array after modification
- Maximum length of repeated subarray
- Maximum number of points with cost
- Maximum score from performing multiplication operations
- Maximum strength of k disjoint subarrays
- Maximum value of k coins from piles
- Minimum additions to make valid string
- Minimum falling path sum
- Minimum falling path sum ii
- Minimum insertion steps to make a string palindrome
- Minimum number of coins for fruits
- Minimum number of operations to satisfy conditions
- Minimum number of refueling stops
- Minimum path cost in a grid
- Minimum path sum
- Minimum skips to arrive at meeting on time
- Minimum sum of values by dividing array
- Minimum time to make array sum at most x
- Minimum total distance traveled
- N th tribonacci number
- Number of great partitions
- Number of strings which can be rearranged to contain substring
- Number of ways of cutting a pizza
- Number of ways to earn points
- Number of ways to form a target string given a dictionary
- Number of ways to stay in the same place after some steps
- Painting the walls
- Partition equal subset sum
- Pascals triangle ii
- Paths in matrix whose sum is divisible by k
- Prison cells after n days
- String compression ii
- Tallest billboard
- Visit array positions to maximize score
- Best time to buy and sell stock iv
- Best time to buy and sell stock with transaction fee
- Count of integers
- Minimum changes to make k semi palindromes
- Minimum one bit operations to make integers zero
- Number of beautiful partitions
- Number of people aware of a secret
- Collecting chocolates
- Freedom trail
- House robber ii
- Maximum sum circular subarray
- Minimum number of flips to make the binary string alternating
- Minimum size subarray in infinite array
- Pizza with 3n slices
- Count of integers
- Count special integers
- Count stepping numbers in range
- Count the number of powerful integers
- Maximum number that sum of the prices is less than or equal to k
- Non negative integers without consecutive ones
- Number of beautiful integers in the range
- Number of digit one
- Numbers at most n given digit set
- Knight dialer
- Knight probability in chessboard
- Maximum number of non overlapping palindrome substrings
- Minimum additions to make valid string
- Number of strings which can be rearranged to contain substring
- Number of ways to paint n 3 grid
- Special permutations
- Maximize the profit as the salesman
- Maximum number of events that can be attended ii
- Maximum profit in job scheduling
- Coin change
- Coin change 2
- Count all possible routes
- Count of sub multisets with bounded sum
- Find the sum of the power of all subsequences
- Length of the longest subsequence that sums to target
- Maximum value of k coins from piles
- Number of great partitions
- Number of ways to earn points
- Ones and zeroes
- Partition equal subset sum
- Tallest billboard
- Delete operation for two strings
- Longest common subsequence
- Max dot product of two subsequences
- Maximum length of repeated subarray
- Minimum ascii delete sum for two strings
- Find the longest valid obstacle course at each position
- Longest increasing subsequence
- Number of longest increasing subsequence
- Build array where you can find the maximum exactly k comparisons
- Combination sum iv
- Maximum number of operations with the same score ii
- Minimum number of days to eat n oranges
- Number of dice rolls with target sum
- Out of boundary paths
- Palindrome partitioning
- Partition string into minimum beautiful substrings
- Partition to k equal sum subsets
- Predict the winner
- Construct smallest number from di string
- Count the number of square free subsets
- Find the shortest superstring
- Maximize score after n operations
- Minimum xor sum of two arrays
- Smallest sufficient team
- Special permutations
- All nodes distance k in binary tree
- Count number of possible root nodes
- Count valid paths in a tree
- Cousins in binary tree ii
- Diameter of binary tree
- Difference between maximum and minimum price sum
- Employee importance
- Find duplicate subtrees
- Find number of coins to place in tree nodes
- Height of binary tree after subtree removal queries
- House robber iii
- Longest path with different adjacent characters
- Longest univalue path
- Maximum number of k divisible components
- Maximum points after collecting coins from all nodes
- Maximum score after applying operations on a tree
- Minimize the total price of the trips
- Minimum cost to change the final value of expression
- Minimum edge reversals so every node is reachable
- Minimum score after removals on a tree
- Most profitable path in a tree
- Flatten a multilevel doubly linked list
- Flatten binary tree to linked list
- Flatten nested list iterator
- 01 matrix
- Amount of time for binary tree to be infected
- As far from land as possible
- Bus routes
- Detonate the maximum bombs
- Divide nodes into the maximum number of groups
- Find the safest path in a grid
- Jump game iv
- Maximum level sum of a binary tree
- Minimum genetic mutation
- Minimum moves to capture the queen
- Minimum number of visited cells in a grid
- Minimum operations to convert number
- Minimum reverse operations
- Nearest exit from entrance in maze
- Open the lock
- Pacific atlantic water flow
- Shortest bridge
- Shortest path to get all keys
- Shortest path with alternating colors
- Special permutations
- Add edges to make degrees of all nodes even
- Collect coins in a tree
- Find champion i
- Find champion ii
- Find the town judge
- Minimum number of vertices to reach all nodes
- Restore the array from adjacent pairs
- Validate binary tree nodes
- Amount of time for binary tree to be infected
- Count number of possible root nodes
- Count pairs of connectable servers in a weighted tree network
- Count paths that can form a palindrome in a tree
- Count valid paths in a tree
- Create components with same value
- Critical connections in a network
- Delete nodes and return forest
- Detect cycles in 2d grid
- Difference between maximum and minimum price sum
- Employee importance
- Find if path exists in graph
- Find number of coins to place in tree nodes
- Find the maximum sum of node values
- Jump game iii
- Keys and rooms
- Longest increasing path in a matrix
- Longest path with different adjacent characters
- Maximum number of k divisible components
- Maximum points after collecting coins from all nodes
- Maximum score after applying operations on a tree
- Minimize the total price of the trips
- Minimum edge reversals so every node is reachable
- Minimum edge weight equilibrium queries in a tree
- Minimum fuel cost to report to the capital
- Minimum number of operations to sort a binary tree by level
- Minimum score after removals on a tree
- Minimum score of a path between two cities
- Minimum time to collect all apples in a tree
- Most profitable path in a tree
- Number of increasing paths in a grid
- Number of nodes in the sub tree with the same label
- Reachable nodes with restrictions
- Reorder routes to make all paths lead to the city zero
- Shortest cycle in a graph
- Time needed to inform all employees
- Validate binary tree nodes
- Count the number of complete components
- Count unreachable pairs of nodes in an undirected graph
- Divide nodes into the maximum number of groups
- Evaluate division
- Most stones removed with same row or column
- Number of islands
- Number of operations to make network connected
- Number of provinces
- Count sub islands
- Flood fill
- Making a large island
- Max area of island
- Maximum number of fish in a grid
- Number of closed islands
- Number of enclaves
- Shortest bridge
- Design graph with shortest path calculator
- Minimum cost of a path with special roads
- Minimum time to visit a cell in a grid
- Minimum time to visit disappearing nodes
- Modify graph edge weights
- Network delay time
- Number of ways to arrive at destination
- Path with maximum probability
- Path with minimum effort
- Reachable nodes in subdivided graph
- Minimum cost to convert string i
- Minimum cost to convert string ii
- Number of possible sets of closing branches
- As far from land as possible
- Find the safest path in a grid
- Shortest bridge
- Shortest path with alternating colors
- Count the number of houses at a certain distance i
- Count the number of houses at a certain distance ii
- Count visited nodes in a directed graph
- Destination city
- Find closest node to given two nodes
- Longest cycle in a graph
- Node with highest edge score
- Where will the ball fall
- Build a matrix with conditions
- Course schedule
- Course schedule ii
- Find eventual safe states
- Maximum strictly increasing cells in a matrix
- Advantage shuffle
- Append characters to string to make subsequence
- Apple redistribution into boxes
- Apply operations on array to maximize sum of squares
- Apply operations to make all array elements equal to zero
- Apply operations to maximize score
- Assign cookies
- Bag of tokens
- Best time to buy and sell stock ii
- Boats to save people
- Candy
- Course schedule iii
- Determine the minimum sum of a k avoiding array
- Divide array into arrays with max difference
- Dota2 senate
- Earliest possible day of full bloom
- Earliest second to mark indices i
- Earliest second to mark indices ii
- Eliminate maximum number of monsters
- Find polygon with the largest perimeter
- Find the maximum number of marked indices
- Find the minimum possible sum of a beautiful array
- Find the value of the partition
- Frog jump ii
- Furthest building you can reach
- Furthest point from origin
- Gas station
- Happy students
- Is subsequence
- Largest number
- Least number of unique integers after k removals
- Lexicographically smallest string after operations with constraint
- Lexicographically smallest string after substring operation
- Longest subsequence with limited sum
- Make array zero by subtracting equal amounts
- Make costs of paths equal in a binary tree
- Make string a subsequence using cyclic increments
- Maximize greatness of an array
- Maximize happiness of selected children
- Maximize the minimum powered city
- Maximum bags with full capacity of rocks
- Maximum element after decreasing and rearranging
- Maximum ice cream bars
- Maximum length of pair chain
- Maximum matching of players with trainer
- Maximum number of coins you can get
- Maximum number of consecutive values you can make
- Maximum number of groups entering a competition
- Maximum number of groups with increasing length
- Maximum number of integers to choose from a range i
- Maximum odd binary number
- Maximum palindromes after operations
- Maximum performance of a team
- Maximum product difference between two pairs
- Maximum product of two elements in an array
- Maximum spending after buying items
- Maximum tastiness of candy basket
- Maximum units on a truck
- Maximum value after insertion
- Maximum xor product
- Mice and cheese
- Minimize maximum pair sum in array
- Minimize the maximum difference of pairs
- Minimum amount of time to fill cups
- Minimum array length after pair removals
- Minimum cost to make array equal
- Minimum deletions to make string k special
- Minimum equal sum of two arrays after replacing zeros
- Minimum levels to gain more points
- Minimum money required before transactions
- Minimum number of arrows to burst balloons
- Minimum number of changes to make binary string beautiful
- Minimum number of coins to be added
- Minimum number of groups to create a valid assignment
- Minimum number of increments on subarrays to form a target array
- Minimum number of operations to make all array elements equal to 1
- Minimum number of operations to make arrays similar
- Minimum number of pushes to type word i
- Minimum number of pushes to type word ii
- Minimum number of taps to open to water a garden
- Minimum operations to make a special number
- Minimum operations to make array equal ii
- Minimum operations to make median of array equal to k
- Minimum operations to make the array increasing
- Minimum processing time
- Minimum rectangles to cover points
- Minimum replacements to sort the array
- Minimum score by changing two elements
- Minimum sum of squared difference
- Minimum time to complete all tasks
- Minimum time to make array sum at most x
- Minimum total cost to make arrays unequal
- Minimum total distance traveled
- Non overlapping intervals
- Number of matching subsequences
- Partition labels
- Patching array
- Prime subtraction operation
- Put marbles in bags
- Queue reconstruction by height
- Rearrange array to maximize prefix score
- Rearranging fruits
- Reduce array size to the half
- Reducing dishes
- Remove adjacent almost equal characters
- Remove duplicate letters
- Remove k digits
- Remove stones to minimize the total
- Reorganize string
- Replace question marks in string to minimize its value
- Score after flipping matrix
- Smallest missing non negative integer after operations
- Split array largest sum
- Split with minimum sum
- Array of doubled pairs
- Binary subarrays with sum
- Brick wall
- Check array formation through concatenation
- Check distances between same letters
- Cinema seat allocation
- Clone graph
- Contains duplicate ii
- Contiguous array
- Continuous subarray sum
- Convert an array into a 2d array with conditions
- Count anagrams
- Count beautiful substrings i
- Count beautiful substrings ii
- Count complete subarrays in an array
- Count number of bad pairs
- Count number of distinct integers after reverse operations
- Count pairs of points with distance k
- Count pairs of similar strings
- Count subarrays with median k
- Count the number of beautiful subarrays
- Count the number of good subarrays
- Count the number of special characters ii
- Delete and earn
- Design hashmap
- Destroy sequential targets
- Determine if two strings are close
- Difference of number of distinct values on diagonals
- Distinct prime factors of product of array
- Encode and decode tinyurl
- Equal row and column pairs
- Evaluate the bracket pairs of a string
- Extra characters in a string
- Find duplicate file in system
- Find longest special substring that occurs thrice i
- Find longest special substring that occurs thrice ii
- Find maximum number of string pairs
- Find missing and repeated values
- Find mode in binary search tree
- Find players with zero or one losses
- Find subarrays with equal sum
- Find the difference of two arrays
- Find the distinct difference array
- Find the length of the longest common prefix
- Find the prefix common array of two arrays
- Find words that can be formed by characters
- Finding the users active minutes
- First completely painted row or column
- First letter to appear twice
- First unique character in a string
- Greatest english letter in upper and lower case
- Group anagrams
- Intersection of two arrays
- Intersection of two arrays ii
- Invalid transactions
- Jewels and stones
- K diff pairs in an array
- Largest positive integer that exists with its negative
- Length of longest subarray with at most k frequency
- Longest arithmetic subsequence of given difference
- Longest consecutive sequence
- Longest nice subarray
- Longest palindrome by concatenating two letter words
- Longest square streak in an array
- Longest uploaded prefix
- Longest word in dictionary
- Lru cache
- Make number of distinct characters equal
- Map sum pairs
- Max number of k sum pairs
- Max points on a line
- Max sum of a pair with equal sum of digits
- Maximum good subarray sum
- Maximum number of integers to choose from a range i
- Maximum number of pairs in array
- Maximum population year
- Maximum square area by removing fences from a field
- Maximum sum of distinct subarrays with length k
- Merge similar items
- Minimize string length
- Minimum amount of time to collect garbage
- Minimum array length after pair removals
- Minimum cost to convert string ii
- Minimum cost to split an array
- Minimum deletions to make character frequencies unique
- Minimum number of operations to make array empty
- Minimum number of steps to make two strings anagram
- Minimum operations to collect elements
- Minimum rounds to complete all tasks
- Minimum total cost to make arrays unequal
- Most frequent even element
- Most popular video creator
- Number of atoms
- Number of black blocks
- Number of distinct averages
- Number of excellent pairs
- Number of good pairs
- Number of nodes in the sub tree with the same label
- Number of wonderful substrings
- Odd string difference
- Optimal partition of string
- Pairs of songs with total durations divisible by 60
- Partition labels
- Path crossing
- Path sum iii
- Permutation in string
- Powerful integers
- Prefix and suffix search
- Rabbits in forest
- Ransom note
- Rearranging fruits
- Reconstruct original digits from english
- Redistribute characters to make all strings equal
- Reduce array size to the half
- Relocate marbles
- Remove zero sum consecutive nodes from linked list
- Reward top k students
- Shortest uncommon substring in an array
- Sliding subarray beauty
- Smallest subarrays with maximum bitwise or
- Subarray sums divisible by k
- Substring xor queries
- Sum of distances
- Sum of matrix after queries
- Sum of prefix scores of strings
- Take k of each character from left and right
- Apply operations to make string empty
- Count elements with maximum frequency
- Count substrings starting and ending with given character
- Find the maximum number of elements in subset
- Least number of unique integers after k removals
- Maximum length substring with two occurrences
- Maximum palindromes after operations
- Minimize length of array using operations
- Minimum deletions to make string k special
- Minimum levels to gain more points
- Minimum number of operations to satisfy conditions
- Minimum number of pushes to type word i
- Minimum number of pushes to type word ii
- Minimum operations to write the letter y on a grid
- Number of students unable to eat lunch
- Replace question marks in string to minimize its value
- Split the array
- Subarrays with k different integers
- Unique number of occurrences
- Find and replace pattern
- Find the longest equal subarray
- First unique number
- Frequency tracker
- Insert delete getrandom o1
- Isomorphic strings
- Most frequent ids
- Find the longest equal subarray
- Group the people given the group size they belong to
- Jump game iv
- Max pair sum in an array
- Minimum seconds to equalize a circular array
- Number of good paths
- Remove letter to equalize frequency
- Insert interval
- Length of the longest valid substring
- Maximum number of events that can be attended
- Minimum number of taps to open to water a garden
- Car pooling
- Divide intervals into minimum number of groups
- Minimum interval to include each query
- My calendar iii
- Number of flowers in full bloom
- Rectangle area ii
- Count days spent together
- Count ways to group overlapping ranges
- Determine if two events have conflict
- Divide intervals into minimum number of groups
- Find the largest area of square inside two rectangles
- Interval list intersections
- Minimum time to complete all tasks
- My calendar iii
- Non overlapping intervals
- Number of flowers in full bloom
- Palindrome rearrangement queries
- Remove covered intervals
- Split the array to make coprime products
- Add two numbers
- Add two numbers ii
- Convert binary number in a linked list to integer
- Convert sorted list to binary search tree
- Copy list with random pointer
- Delete node in a linked list
- Flatten a multilevel doubly linked list
- Flatten binary tree to linked list
- Insert greatest common divisors in linked list
- Insertion sort list
- Intersection of two linked lists
- Linked list random node
- Merge in between linked lists
- Merge k sorted lists
- Merge two sorted lists
- Odd even linked list
- Partition list
- Reorder list
- Delete the middle node of a linked list
- Linked list cycle
- Linked list cycle ii
- Maximum twin sum of a linked list
- Middle of the linked list
- Remove nth node from end of list
- Double a number represented as a linked list
- Flatten a multilevel doubly linked list
- Maximum twin sum of a linked list
- Palindrome linked list
- Remove duplicates from sorted list ii
- Remove linked list elements
- Remove nodes from linked list
- Remove zero sum consecutive nodes from linked list
- Alice and bob playing flower game
- Angle between hands of a clock
- Apply operations to make sum of array greater than or equal to k
- Can make arithmetic progression from sequence
- Construct the longest new string
- Count of matches in tournament
- Distribute money to maximum children
- Find the maximum achievable number
- Fraction to recurring decimal
- Largest perimeter triangle
- Minimum number of operations to make array empty
- Poor pigs
- Replace question marks in string to minimize its value
- Strictly palindromic number
- Sum of absolute differences in a sorted array
- Calculate money in leetcode bank
- Count anagrams
- Count substrings starting and ending with given character
- Count total number of colored cells
- Distribute candies among children i
- Distribute candies among children ii
- Find the pivot integer
- Maximum sum with exactly k elements
- Maximum value at a given index in a bounded array
- Minimum operations to make array equal
- Power of heroes
- 3sum with multiplicity
- Arithmetic slices ii subsequence
- Binary trees with factors
- Build array where you can find the maximum exactly k comparisons
- Count all possible routes
- Count all valid pickup and delivery options
- Count anagrams
- Count beautiful substrings i
- Count beautiful substrings ii
- Count collisions of monkeys on a polygon
- Count good numbers
- Count k subsequences of a string with maximum beauty
- Count nice pairs in an array
- Count number of bad pairs
- Count number of homogenous substrings
- Count number of ways to place houses
- Count pairs of nodes
- Count pairs of similar strings
- Count sorted vowel strings
- Count special integers
- Count substrings starting and ending with given character
- Count the number of fair pairs
- Count the number of good partitions
- Count the number of houses at a certain distance i
- Count the number of houses at a certain distance ii
- Count the number of ideal arrays
- Count the number of infection sequences
- Count unreachable pairs of nodes in an undirected graph
- Count ways to group overlapping ranges
- Domino and tromino tiling
- Find the sum of the power of all subsequences
- Find xor beauty of array
- Iterator for combination
- Maximum number of groups with increasing length
- Minimum number of operations to make string sorted
- Naming a company
- Number of good paths
- Number of music playlists
- Number of strings which can be rearranged to contain substring
- Number of subsequences that satisfy the given sum condition
- Number of ways to divide a long corridor
- Number of ways to reach a position after exactly k steps
- Number of ways to rearrange sticks with k sticks visible
- Number of ways to reorder array to get same bst
- Permutation sequence
- Power of heroes
- Probability of a two boxes having the same number of distinct balls
- Right triangles
- The number of beautiful subsets
- Ways to split array into good subarrays
- Count increasing quadruplets
- Distribute candies among children i
- Distribute candies among children ii
- Find all possible stable binary arrays i
- Find all possible stable binary arrays ii
- Find the sum of subsequence powers
- Kth smallest amount with single denomination combination
- Bitwise xor of all pairings
- Fancy sequence
- Find xor sum of all pairs bitwise and
- Handling sum queries after update
- Find maximum non decreasing array length
- Maximum balanced subsequence sum
- Number of pairs satisfying inequality
- Check if it is a straight line
- Determine if a cell is reachable at a given time
- Max points on a line
- Maximum area of longest diagonal rectangle
- Minimize manhattan distances
- Minimum cuts to divide a circle
- Rectangle area
- Type of triangle ii
- Apply operations to maximize frequency score
- Minimum cost to make array equalindromic
- Minimum operations to make median of array equal to k
- Add digits
- Bulb switcher
- Check if it is a good array
- Check if point is reachable
- Continuous subarray sum
- Count beautiful substrings i
- Count beautiful substrings ii
- Count distinct numbers on board
- Count of interesting subarrays
- Count pairs of connectable servers in a weighted tree network
- Destroy sequential targets
- Excel sheet column title
- Factorial trailing zeroes
- Find the divisibility array of a string
- Find the student that will replace the chalk
- Greatest common divisor of strings
- Integer break
- Make k subarray sums equal
- Maximum element sum of a complete subset of indices
- Maximum number of k divisible components
- Maximum prime difference
- Minimize length of array using operations
- Minimize the maximum of two arrays
- Minimum cost to move chips to the same position
- Minimum deletions to make array divisible
- Minimum number of groups to create a valid assignment
- Minimum number of operations to make all array elements equal to 1
- Minimum rounds to complete all tasks
- Mirror reflection
- Most frequent prime
- Nth magical number
- Number of common factors
- Number of subarrays with gcd equal to k
- Number of subarrays with lcm equal to k
- Prime in diagonal
- Range product queries of powers
- Smallest missing non negative integer after operations
- Subarray sums divisible by k
- Sum multiples
- The number of beautiful subsets
- Create components with same value
- Largest divisible subset
- Smallest value after replacing with sum of prime factors
- Apply operations to maximize score
- Count anagrams
- Count collisions of monkeys on a polygon
- Count good numbers
- Count the number of ideal arrays
- Count the number of infection sequences
- Double modular exponentiation
- Maximize number of nice divisors
- Minimum number of operations to make string sorted
- Number of subsequences that satisfy the given sum condition
- String transformation
- Apply operations to maximize score
- Closest prime numbers in range
- Count primes
- Count the number of ideal arrays
- Count valid paths in a tree
- Distinct prime factors of product of array
- Greatest common divisor traversal
- Largest component size by common factor
- Maximum element sum of a complete subset of indices
- Minimum changes to make k semi palindromes
- Number of different subsequences gcds
- Prime pairs with target sum
- Prime subtraction operation
- Split the array to make coprime products
- Generate random point in a circle
- Implement rand10 using rand7
- Insert delete getrandom o1
- Knight probability in chessboard
- Linked list random node
- New 21 game
- Probability of a two boxes having the same number of distinct balls
- Random pick with weight
- Random point in non overlapping rectangles
- Soup servings
- Difference between ones and zeros in row and column
- Difference of number of distinct values on diagonals
- Find all groups of farmland
- Find the grid of region average
- Increment submatrices by one
- Largest submatrix with rearrangements
- Maximum strictly increasing cells in a matrix
- Modify the matrix
- Right triangles
- Disconnect path in a binary matrix by at most one flip
- Dungeon game
- Last day where you can still cross
- Longest increasing path in a matrix
- Maximum number of moves in a grid
- Minimum falling path sum
- Minimum falling path sum ii
- Minimum path sum
- Most frequent prime
- Paths in matrix whose sum is divisible by k
- Where will the ball fall
- Count negative numbers in a sorted matrix
- Diagonal traverse
- Get biggest three rhombus sums in a grid
- Minimum addition to make integer beautiful
- Minimum number of operations to make x and y equal
- Minimum operations to reduce an integer to 0
- Reach a number
- Checking existence of edge length limited paths
- Find building where alice and bob can meet
- Maximum sum queries
- Minimum absolute difference queries
- Break a palindrome
- Count palindromic subsequences
- Count paths that can form a palindrome in a tree
- Find first palindromic string in the array
- Largest palindromic number
- Lexicographically smallest beautiful string
- Lexicographically smallest palindrome
- Longest palindrome
- Longest palindrome by concatenating two letter words
- Maximum number of non overlapping palindrome substrings
- Maximum palindromes after operations
- Minimum changes to make k semi palindromes
- Minimum cost to make array equalindromic
- Minimum insertion steps to make a string palindrome
- Number of wonderful substrings
- Palindrome linked list
- Palindrome partitioning
- Palindrome partitioning ii
- Palindrome partitioning iii
- Palindrome partitioning iv
- Palindrome rearrangement queries
- Palindromic substrings
- Remove palindromic subsequences
- Unique length 3 palindromic subsequences
- Array nesting
- Minimum number of operations to reinitialize a permutation
- Minimum number of operations to sort a binary tree by level
- Minimum adjacent swaps to reach the kth smallest number
- Minimum number of operations to make string sorted
- Next greater element iii
- Next permutation
- Permutations ii
- Check if strings can be made equal with operations ii
- Make lexicographically smallest array by swapping elements
- Orderly queue
- Semi ordered permutation
- 132 pattern
- Best sightseeing pair
- Best time to buy and sell stock
- Best time to buy and sell stock iii
- Count subarrays with fixed bounds
- Find the score of all prefixes of an array
- Global and local inversions
- Increasing triplet subsequence
- Partition array into disjoint intervals
- Using a robot to print the lexicographically smallest string
- Apply operations to maximize frequency score
- Binary subarrays with sum
- Contiguous array
- Continuous subarray sum
- Count beautiful substrings i
- Count beautiful substrings ii
- Count complete substrings
- Count days spent together
- Count of interesting subarrays
- Count subarrays where max element appears at least k times
- Count subarrays with median k
- Count subarrays with score less than k
- Count tested devices after test operations
- Count vowel strings in ranges
- Delivering boxes from storage to ports
- Execution of all suffix instructions staying in a grid
- Find maximum non decreasing array length
- Find the highest altitude
- Find the score of all prefixes of an array
- Find the substring with maximum cost
- Gas station
- Left and right sum differences
- Longest subsequence with limited sum
- Longest valid parentheses
- Max sum of rectangle no larger than k
- Maximal rectangle
- Maximum good subarray sum
- Maximum nesting depth of two valid parentheses strings
- Maximum product subarray
- Maximum score of spliced array
- Maximum subarray
- Maximum subarray min product
- Maximum sum circular subarray
- Maximum xor for each query
- Minimum absolute difference queries
- Minimum amount of time to collect garbage
- Minimum cost to make all characters equal
- Minimum edge weight equilibrium queries in a tree
- Minimum moves to pick k ones
- Minimum operations to make all array elements equal
- Minimum size subarray in infinite array
- Minimum space wasted from packaging
- Minimum value to get positive step by step sum
- Movement of robots
- Palindrome rearrangement queries
- Random pick with weight
- Random point in non overlapping rectangles
- Range sum query immutable
- Reducing dishes
- Remove zero sum consecutive nodes from linked list
- Subarray sums divisible by k
- Substring with largest variance
- Sum of absolute differences in a sorted array
- Construct product matrix
- Construct quad tree
- Count submatrices with top left element and sum less than k
- Disconnect path in a binary matrix by at most one flip
- Increment submatrices by one
- Maximal square
- Number of submatrices that sum to target
- Number of ways of cutting a pizza
- Range sum query 2d immutable
- Apply operations to make all array elements equal to zero
- Count the number of good partitions
- Count the number of houses at a certain distance i
- Count the number of houses at a certain distance ii
- Increment submatrices by one
- Invalid transactions
- Maximize the minimum powered city
- Maximum nesting depth of the parentheses
- Minimum remove to make valid parentheses
- Remove invalid parentheses
- Constrained subsequence sum
- Earliest second to mark indices ii
- Find original array from doubled array
- First unique character in a string
- Furthest building you can reach
- Ipo
- Jump game vi
- Last stone weight
- Length of the longest valid substring
- Maximal score after applying k operations
- Maximum frequency stack
- Maximum number of events that can be attended
- Maximum number of points from grid queries
- Maximum spending after buying items
- Meeting rooms iii
- Merge k sorted lists
- Minimize deviation in array
- Minimum interval to include each query
- Minimum operations to exceed threshold value ii
- Minimum operations to form subsequence with target sum
- Number of orders in the backlog
- Parallel courses iii
- Process tasks using servers
- Remove stones to minimize the total
- Reorganize string
- Robot collisions
- Sort an array
- Time to cross a bridge
- Total cost to hire k workers
- Design graph with shortest path calculator
- Minimum cost of a path with special roads
- Minimum time to visit a cell in a grid
- Modify graph edge weights
- Network delay time
- Find k pairs with smallest sums
- Find the most competitive subsequence
- Get biggest three rhombus sums in a grid
- Kth largest element in a stream
- Lfu cache
- Maximum elegance of a k length subsequence
- Maximum performance of a team
- Maximum subsequence score
- Minimum cost to hire k workers
- Divide an array into subarrays with minimum cost i
- Divide an array into subarrays with minimum cost ii
- Find median from data stream
- Finding mk average
- Count zero request servers
- Design a food rating system
- Design a number container system
- Design authentication manager
- Design graph with shortest path calculator
- Find edges in shortest paths
- Lfu cache
- Lru cache
- Minimum cost of a path with special roads
- Minimum time to visit a cell in a grid
- Minimum time to visit disappearing nodes
- Modify graph edge weights
- Network delay time
- Number of ways to arrive at destination
- Path with maximum probability
- Reachable nodes in subdivided graph
- Take gifts from the richest pile
- Count increasing quadruplets
- Count of range sum
- Count of smaller numbers after self
- Count pairs with xor in a range
- Create sorted array through instructions
- Delivering boxes from storage to ports
- Distribute elements into two arrays ii
- Fancy sequence
- Jump game vii
- Longest increasing subsequence ii
- Make array empty
- Minimum sum of values by dividing array
- Next greater element iv
- Number of pairs satisfying inequality
- Range sum query mutable
- Handling sum queries after update
- Subarrays distinct element sum of squares i
- Subarrays distinct element sum of squares ii
- Account balance after rounded purchase
- Add to array form of integer
- Alternating digit sum
- Ant on the boundary
- Apply operations to an array
- Arithmetic subarrays
- Arranging coins
- Average salary excluding the minimum and maximum salary
- Average value of even numbers that are divisible by three
- Beautiful towers i
- Best poker hand
- Bulls and cows
- Calculate amount paid in taxes
- Calculate delayed arrival time
- Can place flowers
- Categorize box according to criteria
- Check distances between same letters
- Check if a string contains all binary codes of size k
- Check if a string is an acronym of words
- Check if all the integers in a range are covered
- Check if matrix is x matrix
- Check if number is a sum of powers of three
- Check if strings can be made equal with operations i
- Check if the sentence is pangram
- Check if two string arrays are equivalent
- Check if word equals summation of two words
- Check knight tour configuration
- Convert the temperature
- Count and say
- Count asterisks
- Count number of distinct integers after reverse operations
- Count odd numbers in an interval range
- Count pairs whose sum is less than target
- Count symmetric integers
- Count the digits that divide a number
- Count the number of special characters i
- Count the number of vowel strings in range
- Delete columns to make sorted
- Determine color of a chessboard square
- Determine if string halves are alike
- Determine the winner of a bowling game
- Difference between element sum and digit sum of an array
- Difference between ones and zeros in row and column
- Distribute candies
- Distribute candies to people
- Distribute elements into two arrays i
- Divisible and non divisible sums difference
- Duplicate zeros
- Excel sheet column number
- Existence of a substring in a string and its reverse
- Faulty keyboard
- Find common elements between two arrays
- Find first palindromic string in the array
- Find nearest point that has the same x or y coordinate
- Find numbers with even number of digits
- Find subarrays with equal sum
- Find the array concatenation value
- Find the distance value between two arrays
- Find the losers of the circular game
- Find the maximum divisibility score
- Find the peaks
- Find the pivot integer
- Find the sum of encrypted integers
- Find the town judge
- Find the width of columns of a grid
- Find the winner of an array game
- Find the winner of the circular game
- Find winner on a tic tac toe game
- Find words containing character
- Fizz buzz
- Flipping an image
- Game of life
- Get biggest three rhombus sums in a grid
- Get maximum in generated array
- Greatest english letter in upper and lower case
- Harshad number
- How many numbers are smaller than the current number
- Image overlap
- Image smoother
- Incremental memory leak
- Integer replacement
- Island perimeter
- K items with the maximum sum
- Kids with the greatest number of candies
- Largest 3 same digit number in string
- Largest local values in a matrix
- Largest magic square
- Largest positive integer that exists with its negative
- Largest time for given digits
- Last visited integers
- Latest time you can obtain after replacing characters
- Longest strictly increasing or strictly decreasing subarray
- Make three strings equal
- Match substring after replacement
- Matrix diagonal sum
- Matrix similarity after cyclic shifts
- Maximum 69 number
- Maximum count of positive integer and negative integer
- Maximum difference by remapping a digit
- Maximum number of balloons
- Maximum number of operations with the same score i
- Maximum number of pairs in array
- Maximum score after splitting a string
- Maximum star sum of a graph
- Maximum sum of an hourglass
- Maximum value of a string in an array
- Merge strings alternately
- Merge triplets to form target triplet
- Min max game
- Minimum amount of time to fill cups
- Minimum changes to make alternating binary string
- Minimum distance to the target element
- Minimum domino rotations for equal row
- Minimum hours of training to win a competition
- Minimum number game
- Minimum number of swaps to make the binary string alternating
- Minimum operations to exceed threshold value i
- Minimum time visiting all points
- Modify the matrix
- Most frequent even element
- Next greater element i
- Non decreasing array
- Number of arithmetic triplets
- Number of beautiful pairs
- Number of changing keys
- Number of employees who met the target
- Number of senior citizens
- Number of steps to reduce a number to zero
- Number of unequal triplets in array
- Odd string difference
- Palindrome number
- Pancake sorting
- Partitioning into minimum number of deci binary numbers
- Pass the pillow
- Perform string shifts
- Points that intersect with cars
- Power of three
- Powerful integers
- Push dominoes
- Queries on number of points inside a circle
- Range addition ii
- Remove all occurrences of a substring
- Remove one element to make the array strictly increasing
- Remove palindromic subsequences
- Remove trailing zeros from a string
- Reverse prefix of word
- Row with maximum ones
- Score of a string
- Separate the digits in an array
- Shortest and lexicographically smallest beautiful string
- Shortest distance to target string in a circular array
- Shuffle the array
- Smallest even multiple
- Sort vowels in a string
- Special positions in a binary matrix
- Sum of number and its reverse
- Sum of squares of special elements
- The employee that worked on the longest task
- Time needed to buy tickets
- Toeplitz matrix
- Total distance traveled
- Ugly number
- Water bottles ii
- Zigzag conversion
- 3sum
- 3sum closest
- Apply operations to maximize frequency score
- Binary trees with factors
- Constrained subsequence sum
- Contains duplicate ii
- Continuous subarrays
- Count pairs of nodes
- Count the number of fair pairs
- Count the number of good subarrays
- Count the number of incremovable subarrays i
- Count the number of incremovable subarrays ii
- Divide an array into subarrays with minimum cost i
- Divide an array into subarrays with minimum cost ii
- Find a value of a mysterious function closest to target
- Find all anagrams in a string
- Find the longest equal subarray
- Frequency of the most frequent element
- Fruit into baskets
- Invalid transactions
- K radius subarray averages
- K th smallest prime fraction
- Length of longest subarray with at most k frequency
- Longest duplicate substring
- Longest harmonious subsequence
- Longest subarray of 1s after deleting one element
- Longest substring without repeating characters
- Max consecutive ones iii
- Maximize the confusion of an exam
- Maximize win from two segments
- Maximum beauty of an array after applying operation
- Maximum erasure value
- Maximum number of vowels in a substring of given length
- Maximum points you can obtain from cards
- Maximum strong pair xor i
- Maximum strong pair xor ii
- Maximum sum of almost unique subarray
- Maximum sum of distinct subarrays with length k
- Minimum moves to pick k ones
- Minimum number of operations to make array continuous
- Minimum operations to reduce x to zero
- Minimum recolors to get k consecutive black blocks
- Minimum rectangles to cover points
- Minimum size subarray sum
- Minimum window substring
- Permutation in string
- Sliding subarray beauty
- Subarrays with k different integers
- Subsequence with the minimum score
- Find beautiful indices in the given array i
- Find beautiful indices in the given array ii
- Implement strstr
- Can make arithmetic progression from sequence
- Check if array is good
- Check if the number is fascinating
- Count the number of fair pairs
- Delete greatest value in each row
- Divide players into teams of equal skill
- Find all people with secret
- High access employees
- Largest perimeter triangle
- Largest submatrix with rearrangements
- Longest square streak in an array
- Majority element
- Maximize area of square hole in grid
- Maximum area of a piece of cake after horizontal and vertical cuts
- Maximum gap
- Maximum star sum of a graph
- Minimum absolute difference
- Minimum number of operations to make array continuous
- Minimum number of operations to make arrays similar
- Movement of robots
- Number of distinct averages
- Reduction operations to make the array elements equal
- Sum in a matrix
- The number of beautiful subsets
- The number of weak characters in the game
- Widest vertical area between two points containing no points
- Advantage shuffle
- Array of doubled pairs
- Best team with no conflicts
- Checking existence of edge length limited paths
- Closest room
- Concatenated words
- Container with most water
- Course schedule iii
- Custom sort string
- Design a food rating system
- Diagonal traverse ii
- Divide intervals into minimum number of groups
- Earliest possible day of full bloom
- Eliminate maximum number of monsters
- Find the number of ways to place people i
- Find the number of ways to place people ii
- K closest points to origin
- Largest number
- Longest string chain
- Maximize the profit as the salesman
- Maximum length of pair chain
- Maximum number of points from grid queries
- Maximum profit in job scheduling
- Maximum units on a truck
- Merge k sorted lists
- Minimum number of arrows to burst balloons
- Minimum number of taps to open to water a garden
- Minimum sum of squared difference
- Next greater element iv
- Non overlapping intervals
- Reward top k students
- Sort integers by the number of 1 bits
- Sort the people
- Sort the students by their kth score
- Apply operations to maximize score
- Best team with no conflicts
- Checking existence of edge length limited paths
- Count zero request servers
- Find score of an array after marking all elements
- Ipo
- Make array empty
- Maximum elegance of a k length subsequence
- Maximum subsequence score
- Maximum sum queries
- Minimum time to make array sum at most x
- Robot collisions
- Buy two chocolates
- K closest points to origin
- Kth largest sum in a binary tree
- Make k subarray sums equal
- Mice and cheese
- Neither minimum nor maximum
- Count zero request servers
- Minimum space wasted from packaging
- Number of flowers in full bloom
- Number of good paths
- Closest nodes queries in a binary search tree
- Find right interval
- Invalid transactions
- Make lexicographically smallest array by swapping elements
- Mark elements on array by performing queries
- Relative ranks
- Sum of subarray minimums
- Binary search tree iterator
- Build an array with stack operations
- Min stack
- Removing stars from a string
- Asteroid collision
- Longest valid parentheses
- Make the string great
- Minimum string length after removing substrings
- Remove all adjacent duplicates in string ii
- Using a robot to print the lexicographically smallest string
- Apply operations to maximize score
- Beautiful towers ii
- Daily temperatures
- Find building where alice and bob can meet
- Find the number of subarrays where boundary elements are maximum
- Largest rectangle in histogram
- Maximum score of a good subarray
- Maximum subarray min product
- Maximum sum queries
- Minimum difficulty of a job schedule
- Next greater element ii
- Online stock span
- Baseball game
- Basic calculator
- Basic calculator ii
- Evaluate reverse polish notation
- Minimum cost to change the final value of expression
- Basic calculator
- Basic calculator ii
- Circular sentence
- Compare version numbers
- Complex number multiplication
- Count anagrams
- Count days spent together
- Detect capital
- Evaluate the bracket pairs of a string
- Find duplicate file in system
- Goat latin
- Invalid transactions
- Length of last word
- Minimum cost to change the final value of expression
- Number of different integers in a string
- Reverse words in a string iii
- Reward top k students
- Split message based on limit
- Split strings by separator
- Utf 8 validation
- Concatenated words
- Count prefix and suffix pairs i
- Count prefix and suffix pairs ii
- Find beautiful indices in the given array i
- Find beautiful indices in the given array ii
- Implement strstr
- Longest duplicate substring
- Maximum deletions on a string
- Minimum time to revert word to initial state i
- Minimum time to revert word to initial state ii
- Number of subarrays that match a pattern i
- Number of subarrays that match a pattern ii
- Palindrome pairs
- String transformation
- Sum of prefix scores of strings
- Append characters to string to make subsequence
- Is subsequence
- Longest common subsequence
- Longest uncommon subsequence ii
- Longest word in dictionary through deleting
- Make string a subsequence using cyclic increments
- Maximum number of removable characters
- Number of matching subsequences
- Remove duplicate letters
- Subsequence with the minimum score
- Backspace string compare
- Construct target array with multiple sums
- Maximum segment sum after removals
- Maximum spending after buying items
- Sum of matrix after queries
- Insert into a binary search tree
- Kth smallest element in a bst
- Minimum absolute difference in bst
- Minimum distance between bst nodes
- Number of ways to reorder array to get same bst
- Range sum of bst
- Recover binary search tree
- All elements in two binary search trees
- Binary search tree iterator
- Construct binary search tree from preorder traversal
- Convert bst to greater tree
- Delete node in a bst
- Increasing order search tree
- Binary tree inorder traversal
- Make costs of paths equal in a binary tree
- Maximum level sum of a binary tree
- Populating next right pointers in each node ii
- Add one row to tree
- All nodes distance k in binary tree
- All possible full binary trees
- Average of levels in binary tree
- Balanced binary tree
- Binary tree cameras
- Binary tree level order traversal
- Binary tree level order traversal ii
- Binary tree maximum path sum
- Binary tree preorder traversal
- Binary tree pruning
- Binary tree right side view
- Binary tree tilt
- Binary tree zigzag level order traversal
- Check completeness of a binary tree
- Check if a string is a valid sequence from root to leaves path in a binary tree
- Construct binary search tree from preorder traversal
- Construct binary tree from inorder and postorder traversal
- Construct binary tree from preorder and inorder traversal
- Construct string from binary tree
- Convert bst to greater tree
- Convert sorted array to binary search tree
- Convert sorted list to binary search tree
- Count good nodes in binary tree
- Count nodes equal to average of subtree
- Cousins in binary tree
- Cousins in binary tree ii
- Deepest leaves sum
- Delete node in a bst
- Delete nodes and return forest
- Diameter of binary tree
- Distribute coins in binary tree
- Evaluate boolean binary tree
- Even odd tree
- Find a corresponding node of a binary tree in a clone of that tree
- Find bottom left tree value
- Find duplicate subtrees
- Find largest value in each tree row
- Find mode in binary search tree
- Flatten binary tree to linked list
- Flip binary tree to match preorder traversal
- Height of binary tree after subtree removal queries
- House robber iii
- Increasing order search tree
- Invert binary tree
- Kth largest sum in a binary tree
- Kth smallest element in a bst
- Leaf similar trees
- Longest univalue path
- Longest zigzag path in a binary tree
- Lowest common ancestor of a binary search tree
- Lowest common ancestor of a binary tree
- Maximum depth of binary tree
- Maximum difference between node and ancestor
- Maximum product of splitted binary tree
- Maximum width of binary tree
- Minimum absolute difference in bst
- Minimum depth of binary tree
- Minimum distance between bst nodes
- Minimum number of operations to sort a binary tree by level
- Number of ways to reorder array to get same bst
- Path sum
- Path sum ii
- Path sum iii
- Populating next right pointers in each node
- Pseudo palindromic paths in a binary tree
- Range sum of bst
- Recover binary search tree
- Smallest string starting from leaf
- Symmetric tree
- Validate binary tree nodes
- Binary tree preorder traversal
- Construct binary tree from inorder and postorder traversal
- Construct binary tree from preorder and inorder traversal
- Flip binary tree to match preorder traversal
- Height of binary tree after subtree removal queries
- N ary tree level order traversal
- N ary tree preorder traversal
- Reverse odd levels of binary tree
- Design add and search words data structure
- Implement trie prefix tree
- Length of the longest valid substring
- Longest common suffix queries
- Maximum strong pair xor i
- Maximum strong pair xor ii
- Word search ii
- Assign cookies
- Find all people with secret
- Find indices with index and value difference i
- Find indices with index and value difference ii
- Find k closest elements
- Find the longest semi repetitive substring
- Make lexicographically smallest array by swapping elements
- Maximize greatness of an array
- Merge two 2d arrays by summing values
- Minimum common value
- Minimum length of string after deleting similar ends
- Number of subsequences that satisfy the given sum condition
- Rearrange array elements by sign
- Reverse vowels of a string
- Count unique characters of all substrings of a given string
- Longest nice subarray
- Longest substring without repeating characters
- Maximum erasure value
- Optimal partition of string
- Find all duplicates in an array
- Find all numbers disappeared in an array
- Find missing and repeated values
- Find the difference
- First missing positive
- Missing number
- Broken calculator
- Buddy strings
- Counting elements
- Decoded string at index
- Flip string to monotone increasing
- Leftmost column with at least a one
- Move pieces to obtain a string
- Range module
- Reordered power of 2
- Repeated dna sequences
- Repeated substring pattern
- Replace all digits with characters
- Replace elements in an array
- Reshape the matrix
- Reverse bits
- Reverse linked list
- Reverse linked list ii
- Reverse nodes in k group
- Reverse only letters
- Reverse pairs
- Reverse string
- Reverse words in a string
- Richest customer wealth
- Robot bounded in circle
- Roman to integer
- Rotate array
- Rotate image
- Rotate list
- Rotating the box
- Rotting oranges
- Running sum of 1d array
- Russian doll envelopes
- Same tree
- Score of parentheses
- Scramble string
- Search a 2d matrix
- Search a 2d matrix ii
- Search in a binary search tree
- Search in rotated sorted array
- Search in rotated sorted array ii
- Search insert position
- Search suggestions system
- Seat reservation manager
- Second largest digit in a string
- Selling pieces of wood
- Sentence similarity iii
- Sequential digits
- Serialize and deserialize binary tree
- Serialize and deserialize bst
- Set matrix zeroes
- Set mismatch
- Shift 2d grid
- Shifting letters
- Shifting letters ii
- Short encoding of words
- Shortest distance to a character
- Shortest impossible sequence of rolls
- Shortest palindrome
- Shortest path in a grid with obstacles elimination
- Shortest path in binary matrix
- Shortest path visiting all nodes
- Shortest subarray with sum at least k
- Shortest unsorted continuous subarray
- Shuffle an array
- Sign of the product of an array
- Simplify path
- Single element in a sorted array
- Single number
- Single number ii
- Single number iii
- Single threaded cpu
- Sliding puzzle
- Sliding window maximum
- Sliding window median
- Slowest key
- Smallest integer divisible by k
- Smallest number in infinite set
- Smallest range covering elements from k lists
- Smallest range ii
- Smallest string with a given numeric value
- Smallest string with swaps
- Smallest subtree with all the deepest nodes
- Snakes and ladders
- Sort array by increasing frequency
- Sort array by parity
- Sort array by parity ii
- Sort characters by frequency
- Sort colors
- Sort integers by the power value
- Sort items by groups respecting dependencies
- Sort list
- Sort the matrix diagonally
- Sorting the sentence
- Spiral matrix
- Spiral matrix ii
- Spiral matrix iv
- Split array into consecutive subsequences
- Split linked list in parts
- Splitting a string into descending consecutive values
- Sqrtx
- Squares of a sorted array
- Stamping the sequence
- Steps to make array non decreasing
- Stone game
- Stone game ii
- Stone game iv
- Stone game vii
- Stone game viii
- Stream of characters
- String compression
- String to integer atoi
- Strong password checker ii
- Subarray product less than k
- Subarray sum equals k
- Subarray with elements greater than varying threshold
- Subsets
- Subsets ii
- Substring with concatenation of all words
- Substrings of size three with distinct characters
- Subtree of another tree
- Successful pairs of spells and potions
- Sum of all subset xor totals
- Sum of beauty of all substrings
- Sum of digits in base k
- Sum of distances in tree
- Sum of floored pairs
- Sum of left leaves
- Sum of numbers with units digit k
- Sum of root to leaf binary numbers
- Sum of square numbers
- Sum root to leaf numbers
- Summary ranges
- Super palindromes
- Super washing machines
- Surrounded regions
- Swap nodes in pairs
- Swapping nodes in a linked list
- Swim in rising water
- Target sum
- Task scheduler
- Task scheduler ii
- Teemo attacking
- Tenth line
- Text justification
- The dining philosophers
- The earliest and latest rounds where players compete
- The k weakest rows in a matrix
- The kth factor of n
- The latest time to catch a bus
- The number of full rounds you have played
- The skyline problem
- Three equal parts
- Time based key value store
- Time needed to rearrange a binary string
- To lower case
- Top k frequent elements
- Top k frequent words
- Total appeal of a string
- Transform to chessboard
- Transpose matrix
- Trapping rain water
- Trapping rain water ii
- Triangle
- Trim a binary search tree
- Triples with bitwise and equal to zero
- Truncate sentence
- Two city scheduling
- Two sum
- Two sum ii input array is sorted
- Two sum iv input is a bst
- Ugly number ii
- Uncrossed lines
- Unique binary search trees
- Unique binary search trees ii
- Unique email addresses
- Unique morse code words
- Unique paths
- Unique paths ii
- Unique paths iii
- Valid anagram
- Valid mountain array
- Valid number
- Valid palindrome
- Valid palindrome ii
- Valid parentheses
- Valid parenthesis string
- Valid perfect square
- Valid square
- Valid sudoku
- Valid triangle number
- Validate binary search tree
- Validate ip address
- Validate stack sequences
- Verify preorder serialization of a binary tree
- Verifying an alien dictionary
- Vertical order traversal of a binary tree
- Vowel spellchecker
- Wiggle subsequence
- Wildcard matching
- Word break
- Word break ii
- Word ladder
- Word ladder ii
- Word pattern
- Word search
- Word subsets
- Add strings
- Count complete tree nodes
- Find minimum in rotated sorted array
- Find minimum in rotated sorted array ii
- Find peak element
- Multiply strings
- Next permutation
- Apply operations to make sum of array greater than or equal to k
- Check if all the integers in a range are covered
- Check if two string arrays are equivalent
- Counting bits
- Element appearing more than 25 in sorted array
- Extra characters in a string
- Find all numbers disappeared in an array
- Find the duplicate number
- Flatten nested list iterator
- How many numbers are smaller than the current number
- Kth missing positive number
- Longest increasing subsequence
- Longest strictly increasing or strictly decreasing subarray
- Longest substring with at least k repeating characters
- Longest word in dictionary
- Map sum pairs
- Maximum distance between a pair of values
- Maximum length substring with two occurrences
- Maximum score after splitting a string
- Next greater element i
- Split message based on limit
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