Data Structures & Algorithms

Master array manipulation, string operations, and two-pointer techniques

Build recursive thinking and solve problems with divide & conquer

Traverse trees, explore graphs, and solve connectivity problems

Optimize solutions with memoization and tabulation

Pointer manipulation, reversal, and cycle detection

LIFO/FIFO structures, monotonic stacks, and BFS patterns

Binary search, merge sort, quicksort, and search algorithms

Bitwise operations, XOR tricks, and bit masking