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Hack!
Time Limit: 1 s
Memory Limit: 512 MB
Total points: 100
# 6239. 毒瘤
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Custom Test
The problem was used in the following contest:
2018 安徽省队选拔赛 (AHOI 2018) Day 1
2018 湖南省队选拔赛 (HNOI 2018) Day 1
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