- Count Distinct Elements
- Count Of The Frequency Of Array Elements
- The Intersection Of Two Arrays
- Union Of Two Unsorted Arrays
- Pair With Given Sum In An Unsorted Array
- Subarray With Zero-Sum
- Subarray With Given Sum
- Longest Subarray With A Given Sum
- Longest Subarray With An Equal Number Of 0’S And 1’S
- Longest Common Span With The Same Sum In A Binary Array
- Longest Consecutive Subsequence
- Count Distinct Elements In Every Window
- More Than Nk Occurences