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PKU v. THU (Preliminary Round 2)
Time Limit: 2.0 s
Memory Limit: 256 MB
Hackable ✓
# 7241. Black Sabbath
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Statement
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Custom Test
Attachments
The problem was used in the following contest:
ICPCCamp 2016. Day 6(7). Moscow SU Trinity Contest
Petrozavodsk Winter 2016. Day 4. Moscow SU Trinity Contest
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