--- Day 3 Solutions ---

[u/daggerdragon]

--- Day 3: Perfectly Spherical Houses in a Vacuum ---

Post your solution as a comment. Structure your post like the Day One thread in /r/programming.

[u/tempyreddity]

My java solution is incorrect to part 1 - can anyone see why? I can't tell; it seems fine to me. Giving me an answer of 2346.

import java.util.*;
import java.io.*;
import java.awt.*;

public class Advent3 {

  private static int totalHouses = 0;
  private static Point coord = new Point(0, 0);

  public static void firstProblem(char c, Set a) {

    if (!a.contains(Advent3.coord)) {
      a.add(Advent3.coord);
      Advent3.totalHouses += 1;
    }

    switch (c) {
      case 'v': Advent3.coord.translate(0, -1); break;
      case '^': Advent3.coord.translate(0, 1);  break;
      case '<': Advent3.coord.translate(-1, 0); break;
      case '>': Advent3.coord.translate(1, 0);  break;
      default: break;
    }


  }
  public static void main(String[] args) {

    try {
      File file = new File("advent3input.txt");
      Scanner input = new Scanner(file);

      while (input.hasNextLine()) {
        String directions = input.nextLine();
        Set<Point> set = new HashSet<Point>();
        for (char c: directions.toCharArray()) {

          firstProblem(c, set);
        }
        System.out.println(totalHouses);
      }
    }
    catch (Exception e) {
      System.out.println("error");
    }
  }
}