Competitive Programming

Languages I Use:

Coding Challenge Websites

• CodeForces
• AtCoder
• Junior Training Sheet
• CSES
• LeetCode
• USACO
• Google's Coding Competitions
  • Code Jam
  • Kick Start
  • Hash Code
• CodeChef
• HackerEarth
• Kattis
• TopCoder
• Spoj
• Codewars
• HackerRank
• icpc.global
• csacademy
• vjudge
• Meta Hacker Cup
• Advent of Code
• oj.uz
• Timus Online Judge

Resources:

Learn

• Computer Science Learning Path | FrontendMasters
• USACO Guide
• A Visual Introduction to Algorithms
• A&DS by Pavel Mavrin

Books

• Competitive Programmer’s Handbook by Antti Laaksonen
• C++ Notes for Professionals book
• Algorithms Notes for Professionals book
• JavaScript Data Structures and Algorithms by Sammie Bae
• Cracking the Coding Interview by Gayle Laakmann McDowell

Blogs

• The Ultimate Topic List (with Resources, Problems and Templates) By YouKn0wWho
• C++ tips and tricks By Golovanov399
• I compiled a list of almost all useful blogs ever published on Codeforces By parveen1981
• give this a try (especially if you're feeling down) By rishi
• Useful functions that nobody uses By Qualified
• Useful C++ Tricks By Hikikomorichka

Tools

• Algorithm Visualizer
• clist
• kenkoooo/AtCoderProblems
• Codeforces Tracker
• code-drills
• codeforces diary
• codeforces ladders
• cfviz
• Dynamic A2OJ
• StopStalk

Useful

• Big-O Algorithm Complexity Cheat Sheet (Know Thy Complexities!)
• The Modern JavaScript Tutorial - https://javascript.info/
• C++ Cheat Sheets