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Hack!
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PKU v. THU (Preliminary Round 2)
Time Limit: 3 s
Memory Limit: 1024 MB
# 2207. Edit
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The problem was used in the following contest:
Petrozavodsk Summer 2018. Day 8: Yuhao Du Contest 5
XIX Open Cup named after E.V. Pankratiev, Grand Prix of Zhejiang
This problem is prepared by
bulijiojiodibuliduo
.
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