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Hack!
Day 1
Day 2
Live
Time Limit: 3 s
Memory Limit: 128 MB
Total points: 100
# 4143. 体育课
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The problem was used in the following contest:
2012 山东省队第二轮选拔赛 (SDOI 2012 Round 2) Day 1
TL: 9s → 3s
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