var f,g:text;
    s,nr,i,j,k,t,uc,n:longint;
begin
assign(f,'cifra.in');
assign(g,'cifra.out');
reset(f);
rewrite(g);
readln(f,T);
if (t>=1) and (t<=30000) then
 for i:=1 to t do begin
readln(f,N);
s:=0;
  for j:=1 to n do begin
  nr:=1;
    for k:=1 to j do nr:=nr*j;
  s:=s+nr;
  end;
uc:=s mod 10;
writeln(g,uc);
end;
close(f);
close(g);
end.