#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
int cislo;
bool x = true;
void setup() {
lcd.init();
pinMode(2, INPUT);
pinMode(3, INPUT);
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
attachInterrupt(digitalPinToInterrupt(2) , p1, FALLING);
attachInterrupt(digitalPinToInterrupt(3) , p2, FALLING);

}

void p1()
{
cislo++;
x = true;
}
void p2()
{
cislo--;
x= true;
}

void loop() {
if(x == true)
{
  x = false;
 lcd.clear();
 lcd.print(cislo);
}

}