Problem
A 学习求余
B 数字和
C 爆满的商场
D 姓名团

According to the contest rules, you cannot view your submission details at current.

Oh, there is no clarification!

0921

Status: Done
Rule: OI
Problem: 4
Start at: 2025-9-21 18:30
End at: 2025-9-21 21:00
Duration: 2.5 hour(s)
Host: kcs007
Partic.: 64