UID: 53, Registered at 2026-4-9 22:26:16, last login at 2026-9-29 21:23:03, currently offline.
Solved 2 problems, RP: 19 (No. 94)
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