binarysem buffer; // a binary (0 or 1) semaphore for unscrambling output
binarysem consumidor; // a binary (0 or 1) semaphore for unscrambling output
int contprod = 0;
int cont = 50;
void prod()
{
	while (cont != 0) {
                cont--;

	 	p(buffer); // obtain exclusive access to standard output
	 	cout << "Cont: " << cont << endl;
			contprod = contprod + 1;
			if (contprod == 1 ) {

				v(buffer);
			}
			if (contprod == 2) {

				v(consumidor);
			}


	}
}

void cons()
{
	while (cont != 0) {
                cont--;

	 	p(consumidor); // obtain exclusive access to standard output
	 	cout << "Consume Cont: " << cont << endl;

			contprod = 0;
		v(buffer);


	}
} // decrement

main()
{

	initialsem(buffer,1);
	initialsem(consumidor,0);
	cobegin {
		prod(); cons();
 	}
}