@Test
	public void resolve() {
		int days = daysOfYear(1900);
		int count = 0;
		for (int year = 1901; year <= 2000; year++) {
			for (int mon = 1; mon <= 12; mon++) {
				if (days % 7 == 0) {
					count++;
				}
				
				days += getDaysOfMonth(year, mon);
			}
		}
		print(count);
	}