QOJ.ac
QOJ
The 2nd Universal Cup Finals is coming! Check out our event page, schedule, and competition rules!
Time Limit:
6.0 s
Memory Limit:
1024 MB
Hackable ✓
The 3rd Universal Cup. Stage 28: Haidian Huangzhuang
D. Widely Known Problem
This problem is prepared by
xtqqwq .