LeetCode offers a vast collection of coding challenges categorized by difficulty level and specific topics. It is widely used for interview preparation and improving algorithmic problem-solving skills.
HackerRank provides coding challenges and competitions across various domains, including algorithms, data structures, artificial intelligence, and more. It offers a comprehensive learning platform and coding contests.
CodeSignal offers a wide range of coding challenges, assessments, and interview practice questions. It also provides a feature called Interview Practice, which simulates real interview scenarios.
Topcoder hosts coding competitions and challenges, allowing developers to showcase their skills and compete for prizes. It covers a broad range of coding topics and offers opportunities to work on real-world projects.
Project Euler focuses on challenging mathematical and algorithmic problems. It offers a collection of problems that require creative thinking and problem-solving skills to find efficient solutions.
Codewars provides a gamified approach to coding challenges. It offers a large selection of programming problems, and users can earn ranks and achievements as they solve challenges and improve their skills.
Coderbyte offers a collection of coding challenges and algorithmic exercises. It provides a platform for practicing coding skills, solving challenges, and participating in coding competitions.
Exercism provides coding exercises in various programming languages. It emphasizes mentorship and community feedback, allowing users to learn from experienced developers and improve their coding style.
Codeforces is a competitive programming platform that hosts regular coding contests and challenges. It focuses on algorithmic problem-solving and offers a rating system to track progress.
AtCoder is a Japanese programming contest platform that hosts programming contests and practice problems. It covers a wide range of topics and offers challenges suitable for both beginners and advanced coders.