var n,s,s1:longint;
t,i,rez,j,k:integer;
f,g:text;
type vector=array[0..99] of byte;
const sum:vector=(0,1,5,2,8,3,9,2,8,7,7,8,2,9,5,0,6,9,5,4,4,5,9,6,2,7,3,6,2,1,1,2,6,3,9,4,0,3,9,8,
8,9,3,0,6,1,7,0,6,5,5,6,0,7,3,8,4,7,3,2,2,3,7,4,0,5,1,4,0,9,9,0,4,1,7,2,8,1,7,6,6,7,1,8,4,9,5,8,4,
3,3,4,8,5,1,6,2,5,1,0);
begin
assign(f,'cifra.in');reset(f);
assign(g,'cifra.out');rewrite(g);
read(f,t);
for i:=1 to t do begin
readln(f,n);
s:=1;
s1:=0;
for j:=1 to n do begin
for k:=1 to j do begin
s:=s*k;
end;
s1:=s1+s;
end;
writeln(g,s1 mod 10);
end;
close(f);
close(g);
end.