program SomaImpares;
var
  n : integer;
  i, proximoImpar, soma : integer;
begin
  n := 4;
  i := 0;
  soma := 0;
  while i < n do
  begin
    proximoImpar := 2*i + 1;
    soma := soma + proximoImpar;
    i := i + 1;
  end;
  write(soma);
  write('\n');
end.