Arrays & Hashing (9)
- 217. Contains Duplicate
- 242. Valid Anagram
- 1. Two Sum
- 49. Group Anagrams
- 347. Top K Frequent Elements
- 238. Product of Array Except Self
- 36. Valid Sudoku
- encode-and-decode-strings premium problem
- 128. Longest Consecutive Sequence
- 125. Valid Palindrome
Two Pointers
Stack
Binary Search
Sliding Window
- 209. Minimum Size Subarray Sum (Jamie’s go-to Interview question)