Data Structures

Arrays & Pointers

Strings

Linked Lists

Stacks

Queues

Hash Table

Heaps

Trees

Graphs

Searching

Sorting

Bit Manipulations

Divide & Conquer

Recursion

Back Tracking

Greedy Algorithm

Dynamic Programming

Prefix/Suffix Sum

Sliding Window

Two Pointers

Fast & Slow Pointers

Monotonic Stack

In-place Reversal

Top-K Elements

Topological Sort