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#include <bits/stdc++.h>
#include <math.h>
#include <fstream>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");
typedef long long int lint;
char v[150000];
int main()
{
int n, a;
fin>>n;
for(int i = 1; i <= n; i++)
{
fin>>a;
v[i] = a;
}
for(int i = 1; i <= n; i++)
{
int sum = 0;
for(int j = 1; j <= v[i]; j++)
{
int poww = pow(j, j);
sum += poww;
}
fout<<sum%10<<endl;
}
fin.close();
fout.close();
return 0;
}