Coding Practice
Write C/C++ solutions and get AI-powered feedback on correctness, complexity, edge case handling, and code quality.
53
Problems
20
Easy
28
Medium
5
Hard
Array & Matrix
Array manipulation, two pointers, sliding window, prefix sums
String
String parsing, pattern matching, in-place manipulation
Linked List
Reversal, cycle detection, merge, fast/slow pointers
Data Structures
LRU/LFU cache, heaps, hash tables, trees
| # | Problem | Difficulty | Frequency |
|---|---|---|---|
| 1LRU CacheMedium | |||
| 2Find Median from Data StreamHard | |||
| 3Insert Delete GetRandom O(1)Medium | |||
| 4LFU CacheHard | |||
Math
Integer manipulation, overflow detection, number theory
Bit Manipulation
Bitwise operations, masks, XOR tricks
Systems Programming
Buffered I/O, task scheduling, call tracing