#include <stdio.h>
#include <stdlib.h>
int putere(int i)
{int j,aux;
aux=1;
for(j=1;j<=i;j++)
aux=i*aux;
return aux;
}


int main()
{int n,i,s,t,rest,j;
FILE *f;
FILE *g;
s=0;
f=fopen("cifra.in","rb");
fscanf(f,"%d",&t);
g=fopen("cifra.out","wb");
for(j=1;j<=t;j++)
{fscanf(f,"%d",&i);

s=s+putere(i);
rest=s%10;
fprintf(g,"%d",rest);
fprintf(g,"\n");
i++;

}
   fclose(f);
   fclose(g);


return 0;
}