Community Powered Guide for
Programming Challenges
Programming Challenges
solved.ac is a community project that adds tags and difficulty guides to Baekjoon Online Judge problems.
Currently providing data for 21,050 problems.
Translations to English are incomplete.
After signing in to BOJ, you can toggle the difficulty display in Settings.
Challenges Suited for Your Skill
Bronze for beginners, Silver for experienced, Gold for experts, and beyond —
Train with challenges suited for your skill, and get to know your accomplishments.
Try Our Curations
New to programming challenges? Got lost in your training plan?
Sprout and Class problems will help you get on track.
By the Community
Anyone can contribute!
Write a review for problems you solved, and contribute to the community.