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PKU v. THU (Preliminary Round 2)
Time Limit: 3 s
Memory Limit: 1024 MB
# 7997. 树 V 图
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Custom Test
The problem was used in the following contest:
2024 陕西省队选拔赛 Day 1 (SNOI 2024 Day 1)
This problem is prepared by
bulijiojiodibuliduo
.
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