void setup() {
  Serial.begin(115200);
}
int increment=1;
int cookie = 0;
int i=0;
void loop() {
  if (digitalRead(2)==0){
    cookie = cookie + increment;
    delay(10);
    while (digitalRead(2)==0);
    delay (10);
    Serial.println(cookie);
  }
  if (digitalRead(3)==0){
    if (cookie<100*(2^i)) {
      Serial.println("NO MONEY");
      delay(10);
      while (digitalRead(3)==0);
      delay(10);
    }
    else {
      increment = increment*2;
      delay(10);
      while (digitalRead(3)==0);
      delay (10);
      Serial.println(increment);
    }
  }
}