/*
Tijana Stevanovic, Milutin Aleksic, Dragutin Ostojic, 20222.
*/

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <time.h>
#include <unistd.h>

#define N 3
pthread_barrier_t barrier;
int novcici[3];

void *work(void *i) {
	long tid = (long)i;
	
	while(1) {
		novcici[tid] = rand() % 2;
		
		printf("%ld: %d\n", tid, novcici[tid]);
		
		pthread_barrier_wait(&barrier);
		
		int sum = novcici[0] + novcici[1] + novcici[2];
		
		if(sum == 1 || sum == 2) {
			if(novcici[tid] != novcici[(tid + 1) % 3] && novcici[tid] != novcici[(tid + 2) % 3])
				printf("%ld: Izabran sam\n", tid);
			else
				printf("%ld: Nisam izabran\n", tid);
			break;
		}
		
		printf("%ld: Nisam izabran\n", tid);
		
		pthread_barrier_wait(&barrier);
	}
	
	pthread_exit(NULL);
}

int main() {
	pthread_t threads[N];
	srand(time(NULL));
	
	pthread_barrier_init(&barrier, NULL, N);
	
	for(long i = 0; i < N; i++) {
		pthread_create(threads + i, NULL, work, (void*)i);
	}
	
	pthread_exit(NULL);
}