C3 brake pedal

I have bought a second -hand C3,
and the brake pedal is very high, and the route is short and hard. The car slows well, but tightening with your foot.
In Norauto, I have changed the brake fluid and pills and discs is fine.

Does anyone know what is going to the brake?

Actually, the brakes are very easy to diagnose if the pedal is hard and you have to step on a very strong is the fault of the serve in poor condition, if it is very soft it is air fault in the system or pump problems, if the route is very short and hard as in your case, it is very caused that the sevo is in poor condition, if they are very long it is the fault of pills, tiles or cylinders or pump in poor condition, it is easy to try it, it is easy to Pisa the brake as always, then disconnect the Servo hose and step out if you do not notice any considerable change the servo is the culprit.