LightOJ1317-Throwing Balls into the Baskets

Throwing Balls into the Baskets

 

题意：N个人，M个框，无数个球，每个人进球的概率一样均为p，每次每个人都投一次球称为一轮，问k轮后进了多少个球

解题思路：每轮每个人投了一个，总共投了k*N个球，每个球进球的概率都是p，所以答案为k*N*p

#include <iostream>#include <cstdio>#include <string>#include <cstring>#include <algorithm>#include <queue>#include <cmath>#include <vector>#include <set>#include <bitset>#include <stack>#include <map>#include <climits>#include <functional>using namespace std;#define LL long longconst int INF=0x3f3f3f3f;const double eps=1e-8;int main(){    int t,n,m,k,cas=0;    double p;    scanf("%d",&t);    while(t--)    {        scanf("%d%d%d%lf",&n,&m,&k,&p);        printf("Case %d: %.8lf\n",++cas,n*k*p);    }    return 0;}