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PKU v. THU (Preliminary Round 2)
Time Limit: 1.5 s
Memory Limit: 256 MB
# 4793. Qnp
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Custom Test
The problem was used in the following contest:
Petrozavodsk Summer 2017. Day 2. U of Bucharest Contest
XVIII Open Cup named after E.V. Pankratiev, Grand Prix of Romania
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