HDU 4407 sum 容斥原理
摘要:
算法:利用数据1...N的性质,求与P的互质的个数,位运算,容斥定理。。#include<stdio.h>#include<stdlib.h>#include<string.h>#include<iostream>#include<vector>#include<string>#include<math.h>#include<map>#include<set>#include<algorithm>using namespace std;struct info{ int s,e 阅读全文
posted @ 2012-09-22 21:07 more think, more gains 阅读(327) 评论(0) 推荐(0) 编辑