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#include <fstream>
#include <iostream>
#include <vector>
#include <cmath>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");
vector <int> v;
vector <int> rez;
int cifra(int n)
{
int s=0;
int i;
for(i=1; i<=n; i++)
{
s+=pow(i,i);
}
return s%10;
}
int main()
{
int n,i;
int x;
fin>>n;
for(i=1; i<=n; i++)
{
fin>>x;
v.push_back(x);
}
for(i=0; i<v.size(); i++)
{
rez.push_back(cifra(v[i]));
}
for(i=0; i<rez.size(); i++)
fout<<rez[i]<<"\n";
return 0;
}