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leetcode's Introduction


for coding interview preparation

30-day-leetcoding-challenge

week Challenge Solution
1 Single Number java
1 Happy Number java
1 Maximum Subarray java
1 Move Zeroes java
1 Best Time to Buy and Sell Stock II java
1 Group Anagrams java
1 Counting Elements java
--- ------------------------ -----
2 Middle of the Linked List java
2 Backspace String Compare java
2 Min Stack java
2 Diameter of Binary Tree java
2 Last Stone Weight java
2 Contiguous Array java
2 Perform String Shifts java
--- ------------------------ -----
3 Product of Array Except Self java
3 Valid Parenthesis String java
3 Number of Islands java
3 Minimum Path Sum java
3 Search in Rotated Sorted Array java
3 Construct Binary Search Tree from Preorder Traversal java
3 Leftmost Column with at Least a One java
--- ------------------------ -----
4 Subarray Sum Equals K java
4 Bitwise AND of Numbers Range java
4 LRU Cache java
4 Jump Game java

Algorithms

n Question Solution Difficulty
1 Two Sum java Easy
2 First Unique Character in a String not-yet Easy
3 Add Binary not-yet Easy
4 Reverse Linked List not-yet Easy
5 Reverse Integer not-yet Easy
6 Palindrome Number not-yet Easy
7 Search Insert Position not-yet Easy
8 Largest Perimeter Triangle not-yet Easy
9 Roman to Integer not-yet Easy
10 Longest Common Prefix not-yet Easy
11 Valid Parentheses not-yet Easy
12 Merge Two Sorted Lists not-yet Easy
13 Remove Duplicates from Sorted Array not-yet Easy
14 Remove Element not-yet Easy
15 Implement strStr() not-yet Easy
16 Maximum Subarray not-yet Easy
17 Length of Last Word not-yet Easy
18 Plus One not-yet Easy
19 Sqrt(x) not-yet Easy
20 Climbing Stairs not-yet Easy
21 Remove Duplicates from Sorted List not-yet Easy
22 Merge Sorted Array not-yet Easy
23 Same Tree not-yet Easy
24 Symmetric Tree not-yet Easy
25 Maximum Depth of Binary Tree not-yet Easy
26 Binary Tree Level Order Traversal II not-yet Easy
27 Convert Sorted Array to Binary Search Tree not-yet Easy
28 Linked List Cycle not-yet Easy
29 Min Stack not-yet Easy
30 Intersection of Two Linked Lists not-yet Easy
31 Two Sum II - Input array is sorted not-yet Easy
32 Excel Sheet Column Title not-yet Easy
33 Excel Sheet Column Number not-yet Easy
34 Factorial Trailing Zeroes not-yet Easy
35 Unique Number of Occurrences not-yet Easy
36 Print in Order not-yet Easy
37 Pairs of Songs With Total Durations Divisible by 60 not-yet Easy
38 Single Number not-yet Easy
39 Valid Palindrome not-yet Easy
40 Best Time to Buy and Sell Stock not-yet Easy
41 Best Time to Buy and Sell Stock II not-yet Easy
42 Pascal's Triangle not-yet Easy
43 Pascal's Triangle II not-yet Easy
44 Minimum Depth of Binary Tree not-yet Easy
45 Balanced Binary Tree not-yet Easy
46 Count and Say not-yet Easy
47 Reverse String not-yet Easy
48 Fizz Buzz not-yet Easy
49 Delete Node in a Linked List not-yet Easy
50 Majority Element not-yet Easy
51 Contains Duplicate not-yet Easy
52 Missing Number not-yet Easy
53 Sum of Two Integers not-yet Easy
54 Intersection of Two Arrays II not-yet Easy
55 Count Primes not-yet Easy
56 Rotate Array not-yet Easy
57 Reverse Bits not-yet Easy
58 Shortest Unsorted Continuous Subarray not-yet Easy
59 Merge Two Binary Tree not-yet Easy
60 Invert Binary Tree not-yet Easy
61 Find All Numbers Disappeared in an Array not-yet Easy
62 Path Sum not-yet Easy
63 Path Sum II not-yet Easy
64 Path Sum III not-yet Easy
65 House Robber not-yet Easy
66 Palindrome Linked List not-yet Easy
67 ZigZag Conversion not-yet Easy
68 Remove Nth Node From End of List not-yet Easy
69 Swap Nodes in Pairs not-yet Easy
70 Valid Sudoku not-yet Easy
72 Read N Characters Given Read4 not-yet Easy
73 Implement Stack using Queues not-yet Easy
74 Implement Queue using Stacks not-yet Easy
75 Bulls and Cows not-yet Easy
76 Strobogrammatic Number not-yet Easy
77 Number of Boomerangs not-yet Easy
78 First Bad Version not-yet Easy
79 Binary Tree Paths not-yet Easy
80 Longest Palindrome not-yet Easy
81 Number of Segments in a String not-yet Easy
82 Power of Four not-yet Easy
83 Power of Two not-yet Easy
84 Add Strings not-yet Easy
85 Nested List Weight Sum II not-yet Easy
86 Reverse Vowels of a String not-yet Easy
87 Valid Perfect Square not-yet Easy
88 Ransom Note not-yet Easy
89 Find the Difference not-yet Easy
90 Binary Watch not-yet Easy
91 Sum of Left Leaves not-yet Easy
92 Convert a Number to Hexadecimal not-yet Easy
93 willAdd not-yet Easy
94 willAdd not-yet Easy
95 willAdd not-yet Easy
96 willAdd not-yet Easy
97 willAdd not-yet Easy
98 willAdd not-yet Easy
99 willAdd not-yet Easy
100 willAdd not-yet Easy
--- ------------------------ ------ -----
101 Find K Closest Elements not-yet Medium
102 Find All Anagrams in a String not-yet Medium
103 Add Two Numbers not-yet Medium
104 Add Two Numbers II not-yet Medium
105 Vertical Order Traversal of a Binary Tree not-yet Medium
106 Subarray Sum Equals K not-yet Medium
107 Course Schedule not-yet Medium
108 Continuous Subarray Sum not-yet Medium
109 Battleships in a Board not-yet Medium
110 Number of Islands not-yet Medium
111 Largest Sum of Averages not-yet Medium
112 willAdd not-yet Medium
113 willAdd not-yet Medium
114 willAdd not-yet Medium
115 willAdd not-yet Medium
116 willAdd not-yet Medium
117 willAdd not-yet Medium
118 willAdd not-yet Medium
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160 willAdd not-yet Medium
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162 willAdd not-yet Medium
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164 willAdd not-yet Medium
165 willAdd not-yet Medium
166 willAdd not-yet Medium
167 willAdd not-yet Medium
168 willAdd not-yet Medium
169 willAdd not-yet Medium
170 willAdd not-yet Medium
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171 willAdd not-yet Hard
172 willAdd not-yet Hard
173 willAdd not-yet Hard
174 willAdd not-yet Hard
175 willAdd not-yet Hard
176 willAdd not-yet Hard
177 willAdd not-yet Hard
178 willAdd not-yet Hard
179 willAdd not-yet Hard
180 willAdd not-yet Hard

leetcode's People

Contributors

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Stargazers

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