#include <cstdlib>
#include <fstream>
using namespace std;
ifstream cin("cifra.in");
ofstream cout("cifra.out");
int i,n,v[100002],j,sum,prod,k;
char c[100000001];
int main()
{
  cin>>n;
  for(i=1;i<=n;i++) {cin>>c;
  v[i]=atoi(c);}
for(i=1;i<=n;i++)
{prod=1;
for(j=1;j<=v[i];j++)
{prod=1;
for(k=1;k<=j;k++)
prod*=v[j];}
sum+=prod;
cout<<sum%10<<endl;
}
}