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 long
const 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;
}