新生晚會

53 25 34 43 68 0 Sample Output
31010
1
#include<stdio.h>#include<algorithm>#include<iostream>using namespace std;double home(double n,double m){    double i,j,a=1.0,b=1.0;    double sum = 1.0;    j = m;    while(j--)    {        a=n;        b=m;        sum=sum*a/b;         n--;        m--;    }    return sum;}int main(){    double n,m,t;    cin >> t;    while(t--)    {        cin >> n >> m;        if(m>n)        {           cout << 0 << endl;           continue;        }       printf("%.0lf/n",home(n,m));    }    return 0;}