Android中多点触控以及手势的基础知识

题意：中文题

思路：求至少的话，就求都没有的情况，01背包

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int MAXN = 10005;

int a[MAXN];
int ai,n,m;
double f[MAXN],b[MAXN];

int main(){
	while (scanf("%d%d",&n,&m) != EOF && n+m){
		for (int i = 0; i < m; i++)
			scanf("%d%lf",&a[i],&b[i]);
		for (int i = 0; i <= n; i++)
			f[i] = 1.0;
		for (int i = 0; i < m; i++)
			for (int j = n; j >= a[i]; j--)
				f[j] = min(f[j],f[j-a[i]]*(1-b[i]));
		printf("%.1lf%%\n",(1-f[n])*100);
	}
	return 0;
}

Android中多点触控以及手势的基础知识,布布扣,bubuko.com

Android中多点触控以及手势的基础知识

原文：http://blog.csdn.net/songjinshi/article/details/21002561