#include<stdio.h>
#include<math.h>
 int suma(int n)
{int i,c;
 int s;
s=0;
for(i=1;i<=n;i++)
s=s+pow(i,i);
c=s%10;
return c;
}
int main()
{
int n,i,t;
FILE *f,*g;
f=fopen("cifra.in","r");
fscanf(f,"%d",&t);
g=fopen("cifra.out","w");
for(i=1;i<=t;i++)
{fscanf(f,"%d",&n);
fprintf(g,"%d\n",suma(n));
}
fclose(f);
fclose(g);
return 0;}