#include <fstream>
using namespace std;
ifstream in("cifra.in");
ofstream out("cifra.out");
int main(){
	int n, S=0, P;
	char v[1000000];
	in >> n;
	for(int i=1;i<=n;++i){
        in>>v[i];
		P = 1;
		for(int j=1;j<=i;++j)
			P *= i%10;
		S=(P+S)%10;
        out<<S;
        out<<endl;
	}
	return 0;
}