IBM

1 Longest Palindromic Substring Medium 2 Partition Equal Subset Sum Medium 3 Longest Increasing Path in a Matrix Hard 4 Jump Game II Medium 5 Merge Intervals Medium 6 Set Matrix Zeroes Medium 7 Number of 1 Bits Easy 8 Valid Anagram Easy 9 Longest Consecutive Sequence Medium 10 Longest Substring Without Repeating Characters Medium 11 Evaluate Reverse Polish Notation Medium 12 Koko Eating Bananas Medium 13 Reorder List Medium 14 Merge k Sorted Lists Hard 15 Subtree of Another Tree Easy 16 Construct Binary Tree from Preorder and Inorder Traversal Medium 17 Last Stone Weight Easy 18 Combination Sum Medium 19 N-Queens Hard 20 Walls and Gates Medium 21 Reconstruct Itinerary Hard 22 Min Cost Climbing Stairs Easy 23 Maximum Product Subarray Medium 24 Coin Change 2 Medium 25 Regular Expression Matching Hard 26 Partition Labels Medium 27 Minimum Interval to Include Each Query Hard 28 Multiply Strings Medium 29 Sum of Two Integers Medium 30 Product of Array Except Self Medium