#include <stdio.h>


int main()
{FILE *fin,*fout;
int i,j,k,p,s,f,n;


fin=fopen("cifra.in","r");
fscanf(fin,"%d",&n);

fout=fopen("cifra.out","w");

for (i=1;i<=n;i++)
  {fscanf(fin,"%d",&k);
   s=0;
   for (j=1;j<=k;j++)
     {f=1;
      for (p=1;p<=j;p++)
	{f=f*j;
	 if (f>9) f=f%10;
	 }
      s=s+f;
      if (s>9) s=s%10;
      }
   fprintf(fout,"%d ",s);
   }

fclose(fin);
fclose(fout);

}