int cislo = 0;
void setup() {
  Serial.begin(9600);
DDRD &= ~(1<<2);
PORTD |= (1<<2);
   EIMSK |= 1<<INT0;
   SREG |= 1<<7;
   EICRA |= 1<<ISC01;
   EICRA &= ~(1<<ISC00);

DDRD &= ~(1<<3);
PORTD |= (1<<3);
   EIMSK |= 1<<INT1;
   SREG |= 1<<7;
   EICRA |= 1<<ISC11;
   EICRA &= ~(1<<ISC10);

}

void loop() {
  

}
ISR(  INT0_vect  )
{
Serial.println(cislo++);
}
ISR(  INT1_vect  )
{
  Serial.println(cislo--);
}