#include <fstream>
//#include <cstring>

#include <cmath>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int n,i,j;
int s,x;

struct a
{
    char a[5];
} b[5];





int main()
{

    f>>n;
    f.get();
    i=0;
    while (f.getline(b[i].a,5)) i++;
    int k,t,l;
    j=0;
    for (i=0;i<n;i++)
    {
        for (l=0;l++;) if (b[i].a[l]==0) break;
        //k=strlen(b[i].a);
        k=l;
        j=0;
        while (k!=0) {x+= ((int(b[i].a[j]) ) - 48) * pow(10,k-1);k--;j++;  }
         l=0;
         for (t=0;t<n;t++)
     {
         s=0;
         {
             for (l=1;l<=x;l++)
                s=s+ pow (l,l);
         }
         //g<<s%10<<endl;
     }
     g<<s%10<<endl;

        x=0;}
g.close();



    return 0;
}