#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;
int n,i,s,nr;
string a[100];
ifstream f("cifra.in");
    ofstream gout("cifra.out");
void calcul(string a[100])
{
    for (i=1;i<=n;i++)
    {
        nr=a[i].size();
        s=s+pow(a[i][nr]-'0',a[i][nr]-'0');
        gout <<s%10<<"\n";
    }
};
int main()
{
    f>>n;
    for (i=1;i<=n;i++)
    {
        f>>a[i];
    }
    return 0;
}