#include<iostream>
#include<fstream>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int main(void)
{
    unsigned int s=0, t, q;
    f>>t;
    while(t!=0)
        {
            f>>q;
            unsigned int z = q, x=1;
            while (z!=0)
                {
                    x *= q;
                    --z;
                }
            s += x;
            g<<s%10<<endl;
            t--;
        }
        return 0;
}