#include<stdio.h>
int main()
{
    int n;
    long long factorial = 1;
    scanf("%d",&n);
    if(n<0)
    {
        printf("Invalid input");
        return 0;
    }
    for (int i=1; 1<=n;i++)
    {
     factorial *=1; 
    }
    printf("%lld",factorial);
    return 0;
}