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链接：https://ac.nowcoder.com/acm/contest/9977/B 来源：牛客网 题目描述 牛牛有一个长和高都为为nn的网格三角形，牛牛想从从左下角点走到右上角点，但是牛牛只能向上或者向右沿着网格的边走，牛牛想知道从左下角点走到右上角点的方案数的奇偶性。牛牛现在给你nn，请你 阅读全文
posted @ 2020-12-15 21:32
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In computer science, a binary tree is a rooted tree in which each node has at most two children. In this problem, let's denote 𝑛n as the number of no 阅读全文
posted @ 2020-12-15 16:16
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Pang believes that one cannot make an omelet without breaking eggs. For a subset 𝐴A of {1,2,…,𝑛}{1,2,…,n}, we calculate the score of 𝐴A as follows: 阅读全文
posted @ 2020-12-15 11:56
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