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PKU v. THU (Preliminary Round 2)
Time Limit: 3 s
Memory Limit: 512 MB
Total points: 100
# 4327. Šeširi
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The problem was used in the following contest:
Izborne Pripreme 2022 (Croatian IOI/CEOI Team Selection) Day 1
IOI 2023 中国国家队集训@威海 Day 6
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