组合数

#include<cstdio>int cnr(int m,int n){    if(n==m||n==0)        return 1;    else        return cnr(m-1,n)+cnr(m-1,n-1);}int main(){    int m,n;    scanf("%d%d",&m,&n);    printf("C(%d,%d)=%d\n",m,n,cnr(m,n));    return 0;}