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PKU v. THU (Preliminary Round 2)
Time Limit: 3 s
Memory Limit: 512 MB
# 1257. Easy One
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The problem was used in the following contest:
Petrozavodsk Summer 2020. Day 2. SPb SU LOUD ENOUGH Contest
XXI Open Cup named after E.V. Pankratiev, Grand Prix of SPb
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