1. Prefix Sum
  2. Two Pointer 2:05 Sliding Window 2:54 Fast & Slow Pointer 3:39 Linked List In-Place Reversal 4:36 Monotonic Stack 5:26 Top ‘k’ Elements 6:14 Quick Select 6:33 Overlapping Intervals 7:25 Modified Binary Search 8:56 Depth-First Search(DFS) Breadth-First Search(BFS) Matrix Traversal Backtracking Dynamic Programming