AdventOfCode2017/Day13

Day13Part1.java

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

public class Main {
	private static Firewall[] wall;

	public static void main(String[] args) throws IOException {
		wall = new Firewall[100];
		Files.readAllLines(Paths.get(new File("res/day13").getPath())).forEach(s -> {
			String[] data = s.split(": ");
			wall[Integer.parseInt(data[0])] = new Firewall(Integer.parseInt(data[1]));
		});

		int severity = 0;
		for(int i = 0; i < wall.length; i++) {
			if(wall[i] != null && !wall[i].open(i)) severity += i * wall[i].getDepth();
		}
		System.out.println(severity);
	}

	  
}

class Firewall {

	private int depth;

	public int getDepth() {
		return depth;
	}

	public Firewall(int depth) {
		this.depth = depth;

	}

	public boolean open(int pico) {
		return !(pico % ((depth - 1) * 2) == 0);
	}

}

Day13Part2.java

public class Main {
	private static Firewall[] wall;

	public static void main(String[] args) throws IOException {
		wall = new Firewall[100];
		Files.readAllLines(Paths.get(new File("res/day13").getPath())).forEach(s -> {
			String[] data = s.split(": ");
			wall[Integer.parseInt(data[0])] = new Firewall(Integer.parseInt(data[1]));
		});

		int picos = 0;
		while(!safe(picos)) picos++;
		
		
		System.out.println(picos);
	}
	public static boolean safe(int time) {
	      for(int i = 0; i < 100; i++) {
	         int ind = i + time;
	         if(wall[i] != null && !wall[i].open(ind)) {
	            return false;
	         } 
	      }
	      return true;
	   }

	  
}

class Firewall {

	private int depth;

	public int getDepth() {
		return depth;
	}

	public Firewall(int depth) {
		this.depth = depth;

	}

	public boolean open(int pico) {
		return !(pico % ((depth - 1) * 2) == 0);
	}

}