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Problem 5087 >> 有原题
NiroBC @ 2017-10-27 00:56:08
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3014: [Usaco2012 Nov]Balanced Trees
www.lydsy.com/JudgeOnline/problem.php?id=3014
怪不得看着那么熟悉:)
lavendir @ 2017-10-27 10:53:27
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好的。我们有空会去掉。
wxh010910 @ 2017-10-27 16:04:06
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3547=5084
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