AOJ

AOJ, or AtCoder Beginner Contest, is a series of programming competitions hosted by AtCoder Inc. These contests are designed for beginners and are held regularly. They provide a platform for participants to test and improve their algorithmic problem-solving skills. The problems are typically categorized by difficulty, with the easiest ones suitable for those new to competitive programming.

Each contest consists of a set of problems that participants solve within a limited time frame. Solutions are submitted online and automatically judged. Participants are ranked based on the number of problems solved and the time taken to solve them. The AtCoder rating system tracks a participant's performance, allowing them to gauge their progress over time. AOJ is a valuable resource for individuals looking to learn data structures, algorithms, and general programming techniques in a competitive environment. The platform also offers past problems and solutions for practice and study, making it a comprehensive learning tool.