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Problem B. Harvest of Apples Problem Description There are n apples on a tree, numbered from 1 to n.Count the number of ways to pick at most m apples. 阅读全文
posted @ 2018-08-02 16:04
starry_sky
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题目：小Z的袜子 这题是一道标准的莫队模板。 具体推导看这里 阅读全文
posted @ 2018-08-02 14:40
starry_sky
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