Solve day 16 2015 part 2: Aunt Sue

Author: SimonBaars

src/main/java/com/sbaars/adventofcode/year15/days/Day16.java

@@ -32,6 +32,7 @@ public static void main(String[] args) {
  Day16 day = new Day16();
  day.printParts();
  new com.sbaars.adventofcode.network.Submit().submit(day.part1(), 2015, 16, 1);
+ new com.sbaars.adventofcode.network.Submit().submit(day.part2(), 2015, 16, 2);
  }
 
  private void parseInput() {
@@ -67,14 +68,33 @@ public Object part1() {
 
  @Override
  public Object part2() {
- return 0; // Implement in next part
+ return aunts.stream()
+ .filter(this::matchesAllPropertiesWithRanges)
+ .mapToInt(aunt -> aunt.number)
+ .findFirst()
+ .orElse(0);
  }
 
  private boolean matchesAllProperties(AuntSue aunt) {
  return aunt.properties.entrySet().stream()
  .allMatch(entry -> TARGET_VALUES.get(entry.getKey()).equals(entry.getValue()));
  }
 
+ private boolean matchesAllPropertiesWithRanges(AuntSue aunt) {
+ return aunt.properties.entrySet().stream()
+ .allMatch(entry -> {
+ String property = entry.getKey();
+ int value = entry.getValue();
+ int target = TARGET_VALUES.get(property);
+ 
+ return switch (property) {
+ case "cats", "trees" -> value > target;
+ case "pomeranians", "goldfish" -> value < target;
+ default -> value == target;
+ };
+ });
+ }
+
  private static class AuntSue {
  private final int number;
  private final Map<String, Integer> properties;