Coding Problems

Problem	Category	Source	Difficulty
Leetcode 20 - Valid Parentheses	String - Stack	Leetcode	Easy
Leetcode 33 - Search in Rotated Sorted Array	Array - Binary Search	Leetcode	Medium
Leetcode 49 - Group Anagrams	Arrays - HashMaps - String (Prefix Sum)	Leetcode	Medium
Leetcode 303 - Range Sum Query Immutable	Arrays - Prefix Sum	Leetcode	Easy
Leetcode 560 - Subarray Sum Equals K	Arrays - Prefix Sum	Leetcode	Medium
Leetcode 102 - Binary Tree Level Order Traversal	Tree - Binary Tree - Breadth First Search	Leetcode	Medium
Leetcode 733 - Flood Fill	Array - Matrix - Depth First Search - Breadth First Search	Leetcode	Medium
Leetcode 200 - Number of Islands	Array - Matrix - Depth First Search - Breadth First Search	Leetcode	Medium
Leetcode 547 - Number of Provinces	Graph - Union Find - Depth First Search - Breadth First Search	Leetcode	Medium
HackerRank - Roads and Libraries using the Union Find (Disjoint Sets) data structure	Graph Theory - Union Find	HackerRank	Medium
Leetcode 1752 - Check if Array Is Sorted and Rotated	Array	Leetcode	Easy
Leetcode 721 - Accounts Merge - Union Find	Union Find - Depth First Search - Breadth First Search	Leetcode	medium
Leetcode 721 - Accounts Merge - DFS	Union Find - Depth First Search - Breadth First Search	Leetcode	medium