program main;
var a,b: integer;
begin
  a := 56;
  b := 4;
  a := a - - 4 + +b;
  if (- not not not a <> 65) then
  begin
    a := - - -1;
  end
  else
  begin
    a := 0 + +b;
  end;
  write(a);
end.