
数学
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ACM 弱鸡一枚
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Codeforces 961D Pair Of Lines
outputstandard outputYou are given n points on Cartesian plane. Every point is a lattice point (i. e. both of its coordinates are integers), and all points are distinct.You may draw two straight lines...原创 2018-04-11 18:12:19 · 221 阅读 · 0 评论 -
2018年长沙理工大学第十三届程序设计竞赛 D zzq的离散数学教室1
题目描述 离散数学中有种名叫“哈斯图”的东西。 在这题中,你们需要计算的是一些正整数在偏序关系“整除”下的哈斯图的边数。用大白话讲,在偏序关系“整除”下的哈斯图,就是把一个个正整数看成一个个图的节点,某些节点之间有边。连边的规则是这样的:对于任意两个正整数a和b(a<b)来说,如果b%a==0,并且不存在一个正整数c(a<c<b),使得条件b%c==0和c...原创 2018-04-18 22:07:57 · 385 阅读 · 0 评论 -
hdu 2662 Coin
Problem DescriptionMoon has many coins, but only contains two value types which is 5 cents and 7 cents, Some day he find that he can get any value which greater than 23 cents using some of his coins...原创 2018-07-27 17:02:33 · 235 阅读 · 0 评论