#define set0(R,b) R&= ~(1<<b)
#define set1(R,b) R|= 1<<b
int cislo = 0;

void setup() {
  Serial.begin(9600);
  Serial.println(cislo);
  set0(DDRC, 0);
  set1(PORTC, 0);
  set0(DDRC, 1);
  set1(PORTC, 1);
  /*
  set0(DDRD, 2);
  set1(PORTD, 2);
  set0(DDRD, 3);
  set1(PORTD, 3); */

  SREG |= 1<<7;
  //set0(EICRA, ISC10);
  //set1(EICRA, ISC11);
  //set0(EICRA, ISC00);
  //set1(EICRA, ISC01);
  //set1(EIMSK, INT0);
  //set1(EIMSK, INT1);

  set1(PCICR,PCIE1);
  set1(PCMSK1,PCINT8);
  set1(PCMSK1,PCINT9);

}

void loop() {
 
}

/*ISR(  INT1_vect  )
{
  cislo ++;
  Serial.println(cislo);
}*/

/*ISR(  INT0_vect  )
{
  cislo --;
  Serial.println(cislo);
}*/

ISR( PCINT1_vect )
{
  if((PINC&(1<<0))==0){
  cislo +=2;
  Serial.println(cislo);}
  if((PINC&(1<<1))==0){
  cislo -=2;
  Serial.println(cislo);}
}