Problem 2. number题解

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Problem 2. number题解

number:数学+二分图匹配首先,如果S<N,那么S+1,S+2...N这些数直接放在S+1,S+2...N的位置上(如果其他数x放在这些位置上面,这些数不放在对应位置,那么x一定能放在这些数放的位置,所以直接交换即可)所以可以直接将S和N调换,缩小N.接着看N个连续的数,如果这里面有两个素数,则肯定无解,而在1e9的范围内,素数间隔最大是低于600的,我们就可以通过二分图匹配(s+i与其因数建边)求出最大匹配,若最大匹配为N,则为Yes.实际上,能满足的N其实最大为30多,而菜菜的jyb只…

C#版 - Leetcode 414. Third Maximum Number题解

版权声明: 本文为博主Bravo Yeung(知乎UserName同名)的原创文章,欲转载请先私信获博主允许,转载时请附上网址 http://blog.csdn.net/lzuacm. C#版 - Leetcode 414. Third Maximum Number题解在线提交: https://leetcode-cn.com/problems/third-maximum-number 题目描述 414. 第三大的数给定一个非空数组,返回此数组中第三大的数.如果不存在,则返回数组中最大的数.…

FZU Problem 1853 Number Deletion

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