#include<cstdio>


using ll=long long;

#define MOD 1000000000000LL

int main(void)
{
	ll n;

	while(scanf("%lld", &n)==1)
	{
		if(n>=60)
		{
			printf("%012d\n", 0);
			continue;
		}

		ll ans=1;
		for(int i=1;i<=n;i++)
		{
			ans=ans*i;
			if(ans>=MOD)
			{
				ans%=MOD;
				ans+=MOD;
			}
		}
		if(ans>=MOD)
		{
			printf("%012lld\n", ans%MOD);
		}
		else
		{
			printf("%lld\n", ans);
		}
	}

	return 0;
}