int led_pin = 18;
int button1_pin = 22;
int button2_pin = 21;
int button3_pin = 19;

bool button1, button2, button3, any_button;

void setup() {
  // Serial.begin(115200);
  pinMode(led_pin, OUTPUT);
  pinMode(button1_pin, INPUT_PULLUP);
  pinMode(button2_pin, INPUT_PULLDOWN);
  pinMode(button3_pin, INPUT_PULLUP);
  
  digitalWrite(led_pin, LOW);
}

void loop() {
delay(10);

button1 = digitalRead(button1_pin);
button2 = digitalRead(button2_pin);
button3 = digitalRead(button3_pin);
any_button = !button1 || !button3 || button2;

// Serial.print("any_button = ");
// Serial.println(any_button);

digitalWrite(led_pin,!any_button);
 
}