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PKU v. THU (Preliminary Round 2)
Time Limit: 1 s
Memory Limit: 256 MB
# 7347. HDRF
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Custom Test
The problem was used in the following contest:
ICPCCamp 2017. Day 5. Yandex Cup 2017
Petrozavodsk Winter 2017. Day 4. Yandex Cup 2017
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