AdventOfCode2017/Day23

Day23Part1.java

	public static HashMap<String, Integer> registers = new HashMap<String, Integer>();

	public static void main(String args[]) throws IOException {

		ArrayList<String> bloccs = new ArrayList<String>(
				Files.readAllLines(Paths.get(new File("res/day23").getPath())).stream().collect(Collectors.toList()));

		char[] array = "abcdefgh".toCharArray();

		for (char c : array)
			registers.put(c + "", 0);

		
		int i = 0;
		int counter = 0;
		
		while (true) {
			boolean hasJumped = false;

			String[] data = bloccs.get(i).split(" ");
			String mode = data[0];
			String f1 = data[1];
			String f2 = data[2];

			switch (mode) {

			case "set":
				registers.put(f1, value(f2));
				break;
			case "mul":
				registers.put(f1, registers.get(f1) * value(f2));
				counter++;
				break;
			case "sub":
				registers.put(f1, registers.get(f1) - value(f2));
				break;
			case "jnz":
				if(value(f1) != 0) {
					i += value(f2);
					hasJumped = true;
				}
				break;

			}
			
			
			if(!hasJumped) i++;
			
			if(i >= bloccs.size()) break;
		}

		System.out.println(counter);
		
	}

	private static boolean isNumber(String s) {
		try {
			Integer.parseInt(s);
			return true;
		} catch (NumberFormatException e) {
			return false;
		}
	}

	private static int value(String s) {
		if(isNumber(s)) return Integer.parseInt(s);
		return registers.get(s);
	}