Popular platforms for practicing competitive programming problems include Codeforces, CodeChef, LeetCode, AtCoder, and HackerRank. These platforms offer a range of problems from beginner to advanced levels.

Finding the right resources for practicing competitive programming can make a big difference in your journey to becoming a better coder. Some of the most popular platforms include Codeforces, which is known for its wide range of problem difficulties and frequent contests. Codeforces also has an active community where you can discuss problems and solutions, making it a great platform for learning. CodeChef is another excellent resource, offering long and short contests along with practice problems categorized by difficulty. If you're looking to improve your algorithm and data structure skills, LeetCode is a fantastic platform with a focus on technical interview preparation, but it also caters to competitive programming. AtCoder, based in Japan, offers high-quality contests that are known for their interesting and diverse problem sets. HackerRank, while more focused on interview preparation, also provides a large selection of competitive programming challenges. To make the most of these platforms, start by solving easier problems and gradually work your way up to more difficult ones. Participating in live contests is also a great way to simulate real competition conditions. Additionally, consider joining online coding communities or competitive programming groups where you can exchange knowledge, learn new techniques, and stay motivated.