Product of Array except self, diagonal traverse and Spiral matrix

0/1Knapsack and two sum

Delete and earn, Min failing Path sum

Paint House and Coin change 2

Coin Change and House Robber

Subarray sum eq k, contiguous array and Longest Palindrome

Group anagrams, Isomorphic Strings Word Pattern

Mock Interview Find missing number in a sorted array

Binary search Problems Find first and last position of element , peak element in an array and min in rotated sorted array

Binary search

Implement queue using stack and Design hashmap

Design HashSet and Design MinStack