Here are some resources that you can use to practice algorithms:
1. LeetCode: LeetCode is a popular online platform that provides a large collection of coding problems ranging from easy to hard. It also includes a discussion forum where users can share their solutions and learn from others.
2. HackerRank: HackerRank is another online platform that provides coding challenges and competitions. It also includes tutorials and video lectures to help you learn new concepts.
3. Codeforces: Codeforces is a competitive programming platform that hosts regular coding contests. It also includes a problem archive with thousands of problems that you can practice on.
4. Project Euler: Project Euler is a collection of challenging mathematical problems that require programming skills to solve. It's a great resource for practicing your algorithmic skills and improving your mathematical knowledge.
5. CodeChef: CodeChef is a platform that provides coding competitions, challenges, and practice problems. It also includes a discussion forum and editorial section where you can learn from other users.
6. TopCoder: TopCoder is a platform that provides algorithmic challenges and competitions. It also includes a tutorial section where you can learn new concepts and techniques.
7. CSES Problem Set: The CSES Problem Set is a collection of algorithmic problems that cover a wide range of topics such as dynamic programming, graph algorithms, and number theory. It's a great resource for practicing your algorithmic skills.
8. Practice with a study group: Practicing algorithms with a study group can be a great way to learn from others and stay motivated. You can work together to solve problems and discuss different approaches and techniques.
9. Attend coding competitions: Participating in coding competitions can be a great way to test your skills and learn from other programmers. Competitions like the ACM ICPC, Google Code Jam, and Topcoder provide challenging problems and the opportunity to compete with other programmers.
10. Read books and articles: Reading books and articles about algorithms can help you learn new concepts and techniques. Some popular books on algorithms include "Introduction to Algorithms" by Cormen, Leiserson, Rivest, and Stein, and "Algorithms" by Sedgewick and Wayne.
11. Use online courses: Online courses like Coursera, edX, and Udacity provide structured learning paths for algorithms and other computer science topics. These courses include video lectures, assignments, and quizzes to help you practice and reinforce your knowledge.
12. Join coding communities: Joining coding communities like Reddit, Stack Overflow, and GitHub can be a great way to connect with other programmers and learn from their experiences. You can ask for help with problems, share your solutions, and get feedback on your code.
Remember, practicing algorithms takes time and effort. Start with the basics, practice consistently, and don't be afraid to ask for help. By staying committed and using the resources available to you, you can become proficient in algorithms and improve your programming skills.
Remember to start with easier problems and work your way up to more challenging ones. Good luck with your practice!