UID: 2, Registered at 2024-2-23 10:51:46, last login at 2025-1-20 12:42:31, currently offline.
Solved 7 problems, RP: 0 (No. ?)
求其上者得其中
By signing up a Hydro universal account, you can submit code and join discussions in all online judging services provided by us.
Using your Hydro universal account
