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Hack!
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PKU v. THU (Finals)
Time Limit: 8 s
Memory Limit: 512 MB
Hackable ✓
# 2211. IOI Problem Revised
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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
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