Solution of Data structure and Algorithm problems in C#
Problem: 217 - Contains Duplicate
Link: https://leetcode.com/problems/contains-duplicate/
Tips: hashset to get unique values in array, to check for duplicates easily
Problem: 242 - Valid Anagram
Link: https://leetcode.com/problems/valid-anagram/
Tips: Dictionary to count each char in str1, decrement for str2;
Problem: 1 - Two Sum
Link: https://leetcode.com/problems/two-sum/
Tips: Dictionary