#include<stdio.h>
#define infile "cifra.in"
#define outfile "cifra.out"
#include<math.h>
int n,i,s,a[100],b[100],k;
int main()
{FILE *fin=fopen(infile,"r"),*fout=fopen(outfile,"w");
fscanf(fin,"%d",&n);
for(i=1;i<=n;i++)
fscanf(fin,"%d",&a[i]);
for(i=1;i<=n;i++)
{s=s+pow(a[i],a[i]);
s=s%10;
fprintf(fout,"%d",s);
fprintf(fout,"\n");
}
return 0;
}