Cognizant

1 Lowest Common Ancestor of a Binary Search Tree Medium 2 Binary Tree Maximum Path Sum Hard 3 K Closest Points to Origin Medium 4 Permutations Medium 5 Number of Islands Medium 6 Course Schedule Medium 7 Min Cost to Connect All Points Medium 8 House Robber Medium 9 Word Break Medium 10 Target Sum Medium 11 Maximum Subarray Medium 12 Valid Parenthesis String Medium 13 Rotate Image Medium 14 Detect Squares Medium 15 Reverse Integer Medium 16 Valid Sudoku Medium 17 Trapping Rain Water Hard 18 Valid Parentheses Easy 19 Binary Search Easy 20 Reverse Linked List Easy 21 Find the Duplicate Number Medium 22 Balanced Binary Tree Easy 23 Validate Binary Search Tree Medium 24 Word Search II Hard 25 Find Median from Data Stream Hard 26 Palindrome Partitioning Medium 27 Surrounded Regions Medium 28 Graph Valid Tree Medium 29 Cheapest Flights Within K Stops Medium 30 Decode Ways Medium 31 Longest Common Subsequence Medium 32 Edit Distance Hard 33 Hand of Straights Medium 34 Meeting Rooms Easy 35 Plus One Easy