#include<fstream>
using namespace std;
int main()
{
ifstream fin("cifra.in");
ofstream fout("cifra.out");
int n,i,j,cont,s=0,a[200];
fin>>n;
s=0;
for(i=1;i<=n;i++)
{
fin>>a[i];
cont=1;
for(j=1;j<=a[i];j++)
cont=cont*a[i];
s=s+cont;
fout<<s%10<<endl;
}
}