#include<stdio.h>

long long factorial(int n){
    if( n == 0 || n == 1)
     return 1;
    else
     return n * factorial(n-1);
}
int main(){
    int n;
    printf("Enter an integer:");
    scanf("%d",&n);
    printf("Factorial of %d = %d", n,factorial(n));
    return 0;
    }