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

bool led;

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

}

void loop() {
 delay(10);
 digitalWrite(led_pin,LOW);
 led = digitalRead(led_pin);
 bool button1 =digitalRead(button1_pin); 
  Serial.print("pin1 is " );
  Serial.println(button1);

  bool button2 =digitalRead(button2_pin); 
  Serial.print("pin2 is " );
  Serial.println(button2);

  bool button3 =digitalRead(button3_pin); 
  Serial.print("pin3 is " );
  Serial.println(button3);

bool result = button1 && button2 && button3;
 Serial.print("result is " );
  Serial.println(result);

digitalWrite(led_pin, result)

 
}