Welcome to the official online judge of Longer Vision STEM — where our students train for CCC, USACO, and CSP-J/S.

• 📚 Problem Set — practice problems, organized by contest track
• 🏆 Contest — mock contests under real rules
• 📝 Homework — assignments from your instructor
• 💬 Discussion — ask questions, share solutions after AC

New here? Sign up, then head to the Problem Set and try your first problem. Happy coding!

欢迎来到长景科技官方评测系统。这里是我们 CCC / USACO / CSP-J/S 学员的日常训练场。新同学请先注册账号，然后前往题库开始你的第一道题。

Questions? Visit longervision.ca or ask your instructor.