Program Pascalguru;
procedure nod(n, m: integer);
var
r: integer;
begin
if m = 0 then
begin
writeln('NOD: ', n);
exit;
end;
r := n mod m;
n := m;
m := r;
nod(n, m);
end;
var
n, m: integer;
begin
write('m: ');
readln(m);
write('n: ');
readln(n);
nod(n, m);
readln;
end.