WhereIsHeroFrom:             Zty, what are you doing ?
Zty:                                     I want to calculate N!......
WhereIsHeroFrom:             So easy! How big N is ?
Zty:                                    1 <=N <=1000000000000000000000000000000000000000000000…
WhereIsHeroFrom:             Oh! You must be crazy! Are you Fa Shao?
Zty:                                     No. I haven‘s finished my saying. I just said I want to calculate N! mod 2009


Hint : 0! = 1, N! = N*(N-1)!

Each line will contain one integer N(0 <= N<=10^9). Process to end of file.

For each case, output N! mod 2009

4 
5

24
120

WhereIsHeroFrom

#include<iostream>
using namespace std;
int main()

{
	int N;
	while(cin>>N)
	{
		int sum=1;int result=0;
		if(N<2009)
		{
			for(int i=1;i<=N;i++)
			{ 
				sum*=i;
			   sum%=2009;
			}
		    cout<<sum<<endl;
		}
		else
			cout<<0<<endl;

	}
	return 0;
}