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Hack!
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PKU v. THU (Preliminary Round 2)
Time Limit: 5.0 s
Memory Limit: 512 MB
Hackable ✓
# 7400. Digital Root
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The problem was used in the following contest:
ByteDance-Moscow Workshops Camp 2020. The Final Contest
XX Open Cup named after E.V. Pankratiev, Grand Prix of Bytedance
This problem is prepared by
zimpha
.
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