public static void main(String[] args) {
		
		ArrayList<Problem> pset = new ArrayList<Problem>(); 
		pset.add(new Problem1());
		pset.add(new Problem2());
		pset.add(new Problem3());
		pset.add(new Problem4());
		pset.add(new Problem5());
		pset.add(new Problem6());
		pset.add(new Problem7());
		pset.add(new Problem8());





		
		for(Problem p: pset){
		System.out.println(p.answer());
		}
	}