Hello Codeforces,

It has been a long while, but in this project we close the long-standing open problem proposed by Umnik 2021. You can try it here (discontinued, see the new link below) while supplies last. Currently I only imported problems from Codeforces & BZOJ (the dead Chinese OJ) but adding other OJs should be easy as long as we have the statements crawled (PRs?). Cheers!

Update (8 months later): We finally got an update! In the new version I collected and uploaded most of vjudge (which means 160k problems!). It also got a shiny new domain http://yuantiji.ac. Enjoy! :D