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Hack!
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Time Limit: 1 s
Memory Limit: 512 MB
Interactive
# 4218. Hidden Graph
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The problem was used in the following contest:
Moscow Pre-Finals Workshop 2020. Day 6. RuCode 2020 Championship
XX Open Cup named after E.V. Pankratiev, Grand Prix of Moscow
RuCode 2020 Division A+B Championship Round
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