#include<iostream.h>
#include<fstream.h>
#include<math.h>
int main()
{
ifstream c("cifra.in");
ofstream v("cifra.out");
int t,i,n,u,s=0;
c>>t;
for(i=1;i<=t;i++)
{
c>>n;
s=s+pow(n,n);
u=s%10;
v<<u;
v<<endl;
}
c.close();
v.close();
return 0;
}