#include <iostream>
#include <fstream>
#include <stdlib.h>
using namespace std;
int n,x;
long long s;

ifstream fin("cifra.in");
ofstream fout("cifra.out");

long long pow(int a, int b){
    long long p = 1;
    for(int i = 1; i <= b; i++){
         p = p*a;
    }
    return p;
}

char chari(int n){
    char ret = ' ';
    if(n == 0){ret = '0';}
    else if(n == 1){ret = '1';}
    else if(n == 2){ret = '2';}
    else if(n == 3){ret = '3';}
    else if(n == 4){ret = '4';}
    else if(n == 5){ret = '5';}
    else if(n == 6){ret = '6';}
    else if(n == 7){ret = '7';}
    else if(n == 8){ret = '8';}
    else if(n == 9){ret = '9';}
    return ret;
}

int main()
{
    fin >> n;
    for(int i = 1; i <= n; i++){
        fin >> x;
        s += pow(x, x);
        fout << chari(s%10) << "\n";
    }
    return 0;
}