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

using namespace std;   
  
#define input "cifra.in"   
#define output "cifra.out"   
  
  
ifstream fin (input);   
ofstream fout (output);   
int main ()   
{   
    long long unsigned n,S=0,i,nr,p,k;   
    fin>>n;   
    for(i=1;i<=n;i++)   
    {p=1;
                        fin>>nr; 
                      p=pow(nr,nr);  
                      S+=(p%10);   
                     fout<<S%10;   
                      if(i<=n-1)   
                     fout<<endl;   
                     }   
                     return 0;   
                     }