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PKU v. THU (Preliminary Round 2)
Time Limit: 3 s
Memory Limit: 1024 MB
# 1173. Knowledge Is...
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The problem was used in the following contest:
Petrozavodsk Winter 2021. Day 9. Grand Prix of Suwon
XXI Open Cup named after E.V. Pankratiev, Grand Prix of Suwon
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