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Time Limit: 8 s
Memory Limit: 512 MB
# 2824. 找树
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The problem was used in the following contest:
2019 清华大学学生程序设计竞赛暨高校邀请赛(THUPC 2019)
题目来自 THUPC 2019,Git 仓库地址:
https://github.com/wangyurzee7/THUPC2019
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