ydn

UID: 40558, Registered at 2026-5-13 21:51:02, last login at 2026-5-13 21:51:02, last active at 2026-5-13 22:25:39.

Solved 1 problems, RP: 7.8 (No. 13711)

Bio

This person is lazy and didn't write anything.
Accepted Problems
P4940
Recent Activities

This person is lazy and didn't join any contests or homework.

双指针: 1