text: #include<stdio.h>
  int fact(int n)
  {
    return (n==0) ? 1 : n*fact(n-1);
  }
  int ncr(int n, int r)
  {
    if(r==0)
    return 1;
    else
    return ((fact(n))/((fact(r)*(fact(n-r)))));
  }
  int main()
  {
    printf("%d",ncr(5,5));
  }
  