function SeriaRekursiv(N: Integer): Integer;
begin
  if N = 1 then
    Result := 2
  else
    Result := 2 * N * SeriaRekursiv(N - 1)
end;

function SeriaIterativ(N: Integer): Integer;
var
  I: Integer;
begin
  Result := 1;

  for i := 1 to N do
    Result := Result * 2 * I;
end;

begin
  Writeln(SeriaIterativ(5));
  Writeln(SeriaRekursiv(5));
  ReadLn;
end.