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Hack!
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Time Limit: 2 s
Memory Limit: 256 MB
# 965. Trade
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自定义测试
The problem was used in the following contest:
Petrozavodsk Winter 2021. Day 5. Almost Retired Dandelion Contest
XXI Open Cup named after E.V. Pankratiev, Grand Prix of Nizhny Novgorod
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