#include<fstream.h>
#include<math.h>

using namespace std;

unsigned int i,j,k[30000],s,t,n;

main()
{
      ifstream fin("cifra.in");
      ofstream fout("cifra.out");
      fin>>t;
      
      for(i=1;i<=t;i++)
          {
              cin>>n;
              s=s+pow(n,n);
              k[i]=s%10;  
          }
      for(i=1;i<=t;i++)
          fout<<k[i]<<endl;
          
      fin.close():
      fout.close();
}