Best Coding Challenge Websites 🚀

If you want to improve your coding skills, prepare for interviews, or compete in programming contests, these platforms are the best options:

🔹 Beginner-Friendly Platforms

1️⃣ HackerRank – Great for beginners with problem explanations.
2️⃣ LeetCode – Best for interview prep with company-specific questions.
3️⃣ CodeChef – Beginner-friendly contests with detailed editorials.
4️⃣ Edabit – Simple challenges to build problem-solving habits.

🔹 Competitive Programming Sites

5️⃣ CodeForces – The best for regular contests & rating-based challenges.
6️⃣ AtCoder – Japan-based, great for fast-paced competitive programming.
7️⃣ TopCoder – Advanced-level problems, used in ICPC prep.
8️⃣ CS Academy – Clean UI, great for contest participation.

🔹 Interview & Data Structures/Algorithms Prep

9️⃣ AlgoExpert – Paid platform, excellent for FAANG interview prep.
🔟 Project Euler – Math-heavy algorithmic challenges.
1️⃣1️⃣ GeeksforGeeks – Huge library of DSA problems & explanations.

🔹 AI, Machine Learning & Data Science Challenges

1️⃣2️⃣ Kaggle – Best for ML, AI, and data science competitions.
1️⃣3️⃣ Google Colab Notebooks – Great for testing AI/ML problems.

🔹 Real-World & Open-Ended Coding Challenges

1️⃣4️⃣ Codewars – Fun, community-driven challenges (Katas).
1️⃣5️⃣ Advent of Code – Seasonal, storytelling-based coding challenges.
1️⃣6️⃣ HackerEarth – Used by companies for hiring & coding contests.
1️⃣7️⃣ Exercism – Human-reviewed coding mentorship platform.

🔹 Bonus – Cybersecurity & Ethical Hacking

1️⃣8️⃣ OverTheWire – Great for learning Linux & cybersecurity.
1️⃣9️⃣ CTFtime – Best for Capture The Flag (CTF) competitions.
2️⃣0️⃣ PicoCTF – Beginner-friendly hacking challenges.

Which One Should You Choose?

✅ For Interviews: LeetCode, AlgoExpert, GeeksforGeeks
✅ For Competitive Coding: CodeForces, AtCoder, CodeChef
✅ For Fun & Learning: Codewars, Project Euler, Advent of Code
✅ For ML/AI/Data Science: Kaggle, Google Colab
✅ For Cybersecurity: OverTheWire, CTFtime