semaphore s;
semaphore t;

void a(){
	cout << "Proces 1" <<endl;
	signal(s);
}

void b(){
	wait(s);
	cout <<"Proces 2" <<endl;
	signal(t);
}

void c(){
	wait(t);
	cout <<"Proces 3" <<endl;
}

main(){
	initialsem(s, 0);
	initialsem(t, 0);
	cobegin{
		a(); b(); c();
	}
}