#include <fstream>
using namespace std;
ifstream in("date.in");
ofstream out("date.out");
int main(){
	int n, S=0,P,k=0,c[101],i;
	char v[101];
	in >> n;
	for( i=1;i<=n;++i){
        in>>v[i];
		P = 1;
		for(int j=1;j<=i;++j)
			P *= i%10;
		S=(P+S)%10;
		k++;
        c[k]=S;
    }
    for(i=1;i<=n;i++)
    {
        out<<c[i];
        out<<endl;
    }
	return 0;
}