#include<stdio.h>
int fact(int x)
{
    int i,factorial=1;
    for(i=1;i<=x;i++)
    {
        factorial=factorial*i;
    }
    return factorial;
}
int main()
{
    int n;
    scanf("%d",&n);
   int result=fact(n);
    printf("Factorial is %d",result);
}