#include <stdio.h>
int fact(int k);
void main()
{
    int n,r,ncr;
    printf("enter the values to and r:");
    scanf("%d %d",&n,&r);
    ncr=fact(n)/(fact(r)*fact(n-r));
    printf("\n value of ncr=%d",ncr);
}

int fact(int k)
    {
        if(k==1)
            return(1);
        else
        return(k*fact(k-1));
    }