> #include<iostream.h>
> #include<iomanip.h>
> int main()
> {
> 	int n,i;
> 	while(cin>>n)
> 	{
> 		int m=1;
> 		for(i=1;i<=n;i++)
> 		{
> 			m=m*i;
> 			if(m%10==0)
> 				while(m%10==0)
> 					m=m/10;
> 			m=m%100000;
> 		}
> 		cout<<setw(5)<<n<<" -> "<<m%10<<endl;
> 	}
> 	return 0;
> }


orz