Competitive Programming

Practice Platforms

LeetCode - leetcode.com
2000+ problems, company-specific questions, mock interviews.
Best for: Interview preparation

Codeforces - codeforces.com
Regular contests, rating system, editorial solutions.
Best for: Competitive programming

CodeChef - codechef.com
Monthly contests, learning tracks, peer discussion.
Best for: Beginners to advanced

AtCoder - atcoder.jp
Japanese platform, high-quality problems.
Best for: Advanced algorithmic challenges

HackerRank - hackerrank.com
Skill certifications, domain-specific tracks.
Best for: Structured learning