2017icpc乌鲁木齐网络赛Colored Graph (构造)

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2017icpc乌鲁木齐网络赛Colored Graph (构造)

题目 https://nanti.jisuanke.com/t/16958 题意给定一个n(n<=500)个点的无向图,给每条边黑白染色,输出同色三角形最少的个数和对应的方案分析首先考虑给定一个染色完毕的无向图,如何求同色三角形的个数同色三角形的个数=总的个数-异色三角形的个数而一个异色三角形对应两个异色角,所以我们可以通过算异色角的个数来计算异色三角形的个数而异色角是有一个固定的点i引出去的n-1条边所决定的设某个点i有$x_i$条1边,有$n-1-x_i$条2边可以发现异色角…

2017icpc 乌鲁木齐网络赛

A .Banana Bananas are the favoured food of monkeys. In the forest, there is a Banana Company that provides bananas from different places. The company has two lists. The first list records the types of bananas preferred by different monkeys, and the s…

2017乌鲁木齐网络赛 j 题

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