Day 3: Testfile works.. answer still wrong :-(

src/main/kotlin/Main.kt

@@ -1,5 +1,14 @@
 import day1.Day1
+import day2.Day2
+import day2.Hand
+import day3.Day3
 
 fun main() {
-    println("Day 1: ${Day1.answerOne()} &&  ${Day1.answerTwo()}")
+    println("Day 1-1: ${Day1.answerOne()}")
+    println("Day 1-2: ${Day1.answerTwo()}")
+    println("Day 2-1: ${Day2.sumOfCompatibleGames("src/main/resources/day2/input.txt", Hand(12,13,14))}")
+    println("Day 2-2: ${Day2.powerOfMinimumSetOfCubes("src/main/resources/day2/input.txt")}")
+    println("Day 3-1: ${Day3.sumOfSelectedParts("src/main/resources/day3/input.txt")}")
+
+
 }

src/main/kotlin/day2/Day2.kt

@@ -4,28 +4,36 @@ import java.io.File
 
 object Day2 {
 
-    fun sumOfCompatibleGames(hand: Hand) = readGames()
+    fun sumOfCompatibleGames(file: String, hand: Hand) = readGames(file)
         .filter { it.isCompatibleWith(hand) }
         .map(Game::id)
         .sum()
 
-    private fun readGames(): List<Game> =
+    fun powerOfMinimumSetOfCubes(file: String) = readGames(file)
-        File("src/main/resources/day2/input.txt")
+        .map(Game::powerOfHands)
+        .sum()
+
+    private fun readGames(file: String): List<Game> =
+        File(file)
             .readLines()
             .map(Game.Companion::parse)
 
 }
 
 data class Game(val id: Int, val hands: List<Hand>) {
+
     fun isCompatibleWith(hand: Hand) =
-        hand.fitsIn(
+        hand.fitsIn(maxOfHands())
-            hands.fold(Hand(0, 0, 0)) { currentMax: Hand, next: Hand ->
+
-                Hand(
+    fun powerOfHands() = maxOfHands().let { it.red * it.green * it.blue }
-                    maxOf(currentMax.red, next.red),
+
-                    maxOf(currentMax.green, next.green),
+    private fun maxOfHands() = hands.fold(Hand(0, 0, 0)) { currentMax: Hand, next: Hand ->
-                    maxOf(currentMax.blue, next.blue)
+        Hand(
-                )
+            maxOf(currentMax.red, next.red),
-            })
+            maxOf(currentMax.green, next.green),
+            maxOf(currentMax.blue, next.blue)
+        )
+    }
 
     companion object {
 
@@ -41,7 +49,7 @@ data class Game(val id: Int, val hands: List<Hand>) {
             }
 
 
-        private val NUMBER_REGEX = Regex("\\d")
+        private val NUMBER_REGEX = Regex("\\d+")
     }
 }
 

src/main/kotlin/day3/Day3.kt

@@ -0,0 +1,63 @@
+package day3
+
+import java.io.File
+
+object Day3 {
+
+    fun sumOfSelectedParts(file: String): Int =
+        readLines(file)
+            .let { lines ->
+                readParts(lines)
+                    .filter { parts -> parts.isSelected(lines) }
+            }
+            .sumOf { it.number }
+
+    fun readLines(file: String): List<String> =
+        File(file)
+            .readLines()
+
+    fun readParts(lines: List<String>): List<Part> =
+        lines
+            .flatMapIndexed<String, Part> { y, line ->
+                line.foldIndexed(mutableListOf()) { x, parts, character ->
+                    when {
+                        character.isDigit() ->
+                            if (parts.lastOrNull()?.isIn(x, y) != true) {
+                                val number = STARTING_NUMBERS_REGEX.find(line.substring(x))!!.value
+                                parts.addLast(
+                                    Part(
+                                        number.toInt(),
+                                        Coordinate(x, y),
+                                        Coordinate(x + number.length - 1, y)
+                                    )
+                                )
+                            }
+                    }
+                    parts
+                }
+            }
+
+    private val STARTING_NUMBERS_REGEX = Regex("""^\d+""")
+}
+
+data class Part(val number: Int, val from: Coordinate, val to: Coordinate) {
+    fun isIn(x: Int, y: Int): Boolean =
+        x >= from.x
+                && x <= to.x
+                && y >= from.y
+                && y <= to.y
+
+    fun isSelected(engine: List<String>) =
+        engine.hasSymbols(from.x - 1, from.y - 1, to.x - from.x + 1 + 2) // above
+                || engine.hasSymbols(from.x - 1, from.y + 1, to.x - from.x + 2) // below
+                || engine.hasSymbols(from.x - 1, from.y, 1) // left
+                || engine.hasSymbols(to.x + 1, from.y, 1) // right
+
+}
+
+private fun List<String>.hasSymbols(x: Int, y: Int, length: Int) =
+    y > 0 && y < size - 1 && this[y].let { it.substring(maxOf(0, x), minOf(it.length, maxOf(0, x) + length)) }
+        .any { !(it.isDigit() || it == '.') }
+
+
+data class Coordinate(val x: Int, val y: Int)

src/main/resources/day2/input.txt

@@ -1,5 +1,100 @@
-Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 1: 1 green, 2 red, 6 blue; 4 red, 1 green, 3 blue; 7 blue, 5 green; 6 blue, 2 red, 1 green
-Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 2: 1 green, 17 red; 1 blue, 6 red, 7 green; 2 blue, 4 red, 7 green; 1 green, 6 red, 2 blue
-Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 3: 6 red, 15 blue, 15 green; 1 green, 4 red, 12 blue; 14 blue, 9 red, 1 green; 2 red, 15 blue, 12 green
-Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 4: 8 green, 10 blue, 6 red; 20 blue, 4 red; 17 blue, 2 green, 3 red; 4 blue, 2 green, 3 red; 10 red, 3 blue, 3 green; 5 green, 14 blue, 6 red
-Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
+Game 5: 3 green, 8 blue, 2 red; 11 red, 6 green, 11 blue; 8 red, 5 blue, 2 green
+Game 6: 2 blue, 12 red, 2 green; 3 green, 2 red; 3 green, 3 blue, 10 red; 7 red, 2 blue, 4 green; 1 red, 2 blue, 5 green
+Game 7: 1 red, 8 blue, 2 green; 1 red, 2 blue, 12 green; 1 blue; 3 blue, 3 green
+Game 8: 10 green, 4 red, 4 blue; 12 green, 1 blue; 1 red, 13 green, 2 blue; 12 green, 3 blue; 9 green, 7 red
+Game 9: 1 green, 1 blue, 3 red; 3 blue, 3 red, 8 green; 6 blue, 4 red, 6 green; 2 red, 7 green; 1 red, 10 green, 13 blue; 5 red, 1 blue, 1 green
+Game 10: 9 green, 3 red, 3 blue; 12 green, 2 blue; 18 green, 1 blue; 14 green; 2 blue, 9 green, 2 red
+Game 11: 14 green; 2 green, 2 red, 11 blue; 9 blue, 3 green
+Game 12: 9 green, 3 blue, 8 red; 1 green, 2 blue, 3 red; 4 blue, 8 red, 10 green; 3 blue, 7 red, 8 green; 3 blue, 5 red, 7 green; 2 blue, 5 green
+Game 13: 6 red, 1 blue, 10 green; 7 red, 1 green; 8 red, 2 green, 1 blue
+Game 14: 2 red, 4 blue, 2 green; 2 green, 5 red, 1 blue; 1 red, 6 blue
+Game 15: 7 blue, 3 red; 13 blue, 8 red, 1 green; 1 green, 5 red, 13 blue; 8 red, 5 blue; 4 red, 3 blue, 1 green; 12 blue, 8 red, 1 green
+Game 16: 5 blue, 1 green, 2 red; 2 blue, 20 green; 4 blue, 1 red, 17 green; 10 green, 5 blue, 2 red
+Game 17: 6 red, 13 blue, 8 green; 12 blue, 7 green, 9 red; 19 blue, 5 red; 2 green, 8 red, 14 blue
+Game 18: 5 red, 2 green, 1 blue; 8 blue, 17 red, 9 green; 2 blue, 1 green; 4 blue, 10 red; 5 blue, 4 red, 6 green
+Game 19: 5 red, 12 green; 8 red, 13 green, 1 blue; 1 red, 1 green, 3 blue; 5 green, 5 red
+Game 20: 11 red, 8 blue; 9 red, 2 green, 13 blue; 2 red, 1 green, 2 blue; 1 green, 9 blue, 13 red; 3 blue, 5 red, 1 green
+Game 21: 1 red, 4 green, 11 blue; 3 green, 15 blue; 6 green, 7 red, 14 blue; 15 blue, 6 green, 10 red; 6 red, 16 blue, 2 green
+Game 22: 2 blue, 15 green, 2 red; 3 blue, 6 green, 1 red; 2 blue, 5 green, 1 red; 6 green, 2 red, 2 blue; 4 green, 2 blue; 4 blue, 1 red, 15 green
+Game 23: 2 blue, 1 green, 12 red; 5 blue, 11 red, 4 green; 12 red, 4 blue; 12 red, 2 green, 5 blue
+Game 24: 4 blue, 7 red; 3 red, 3 blue; 1 red, 4 blue; 2 green, 6 red, 6 blue; 7 red, 1 green, 2 blue; 6 red, 1 blue, 1 green
+Game 25: 5 green, 9 blue; 6 green, 7 red, 2 blue; 1 red, 3 blue, 7 green; 9 blue, 3 red; 5 green, 9 blue, 2 red
+Game 26: 6 red, 4 blue; 2 blue, 4 green; 3 green, 5 red, 5 blue; 4 green, 6 red, 3 blue; 4 green, 7 red, 4 blue
+Game 27: 15 green, 1 blue, 12 red; 12 red, 1 green; 1 red, 1 blue, 5 green; 13 green, 6 red, 1 blue; 5 red, 1 blue, 1 green; 11 red, 14 green
+Game 28: 3 blue, 2 green, 10 red; 5 blue, 2 green; 4 green, 3 blue, 11 red
+Game 29: 10 blue, 2 red; 17 green, 7 blue, 2 red; 1 blue, 8 green, 1 red; 10 green, 2 red, 3 blue
+Game 30: 10 green, 8 red, 1 blue; 4 blue, 7 green, 14 red; 2 blue, 14 red, 11 green; 1 blue, 13 green, 12 red; 5 blue, 2 red, 4 green; 4 green, 5 red
+Game 31: 4 green, 11 red, 11 blue; 3 blue, 11 red; 5 blue, 7 red, 3 green; 10 blue, 5 green, 1 red
+Game 32: 4 red, 8 blue, 1 green; 14 red, 7 blue, 4 green; 13 red, 3 blue, 9 green; 3 red, 1 green, 8 blue; 8 green, 8 red, 5 blue
+Game 33: 6 red, 10 blue, 7 green; 19 blue, 1 red; 6 green, 11 red, 11 blue; 2 green, 2 blue, 12 red; 3 red, 13 blue, 7 green; 6 green, 4 red, 2 blue
+Game 34: 3 red, 3 green, 15 blue; 7 green, 15 blue; 3 red, 2 green, 8 blue; 19 green, 18 blue
+Game 35: 2 green, 1 blue; 2 green, 2 blue, 1 red; 3 blue, 1 red, 1 green; 4 blue, 1 red
+Game 36: 1 red, 11 green; 1 green, 1 blue; 8 blue; 2 green, 3 red; 1 red
+Game 37: 4 blue, 3 red; 12 blue, 13 red; 2 red, 2 green, 8 blue
+Game 38: 8 red, 2 blue; 1 green, 2 red; 8 red, 2 green, 1 blue; 16 red, 2 green; 7 red, 2 blue, 2 green
+Game 39: 6 green, 1 blue, 5 red; 14 green, 8 blue, 6 red; 8 red, 10 blue, 1 green; 14 green, 9 red; 17 blue, 5 red; 1 blue, 7 green, 1 red
+Game 40: 4 red, 8 blue, 3 green; 13 blue, 1 red; 3 blue, 7 red, 3 green; 3 green, 8 blue, 10 red; 3 green, 20 blue, 5 red
+Game 41: 1 blue, 2 green; 11 green, 2 blue; 5 blue; 15 red, 8 green, 5 blue
+Game 42: 1 green, 12 blue, 1 red; 6 blue, 1 green, 5 red; 1 red, 11 blue, 4 green; 3 red, 17 blue, 1 green; 1 red, 11 blue; 9 blue, 6 green, 3 red
+Game 43: 16 blue, 13 green, 1 red; 17 blue, 7 red, 10 green; 13 green, 5 red, 7 blue
+Game 44: 2 blue, 4 red; 15 green, 7 red; 2 green, 1 blue; 6 red, 13 green
+Game 45: 5 green, 1 blue, 8 red; 4 red, 1 blue, 5 green; 1 green, 3 red; 1 green, 2 blue, 6 red; 4 red, 3 green, 2 blue; 2 red, 2 blue, 5 green
+Game 46: 1 green, 1 red, 6 blue; 11 blue; 1 red, 1 green, 7 blue; 8 blue; 1 green, 7 blue, 2 red
+Game 47: 7 green, 9 blue, 7 red; 11 red, 13 blue, 5 green; 12 green, 12 blue, 5 red; 4 blue, 8 green, 7 red
+Game 48: 11 green, 7 red, 2 blue; 2 blue, 10 green, 3 red; 1 blue, 2 red, 1 green; 4 green, 2 red, 7 blue; 7 red, 4 green, 2 blue
+Game 49: 1 red, 2 blue, 5 green; 2 green, 4 blue; 5 blue, 2 green, 1 red; 9 blue, 1 green; 7 blue
+Game 50: 8 green, 9 blue, 2 red; 2 green, 5 blue; 14 green, 1 red, 8 blue
+Game 51: 1 green, 2 blue; 12 blue, 1 red; 2 blue
+Game 52: 3 red, 2 blue, 2 green; 4 red, 4 green, 7 blue; 2 blue, 4 red, 1 green; 3 green; 1 red, 9 green, 7 blue
+Game 53: 9 blue, 12 red, 7 green; 8 blue, 6 green; 1 green, 8 blue, 9 red; 12 red, 6 green; 9 blue, 14 red, 10 green; 7 red, 3 green, 5 blue
+Game 54: 8 green, 5 blue, 5 red; 4 green, 13 blue, 2 red; 2 blue, 5 red, 1 green; 3 red, 3 green, 10 blue
+Game 55: 17 red, 15 green, 17 blue; 6 red, 5 green, 7 blue; 17 green, 6 blue, 5 red
+Game 56: 7 blue, 6 red, 7 green; 10 green, 3 red; 9 red, 3 blue, 5 green
+Game 57: 5 blue, 11 red, 1 green; 13 red, 1 green, 2 blue; 2 blue, 4 red; 1 green, 10 red, 1 blue; 1 green, 8 red
+Game 58: 1 red, 2 green, 9 blue; 1 green, 1 blue, 1 red; 2 red, 6 blue, 2 green; 14 blue, 1 green, 1 red; 5 blue, 1 red, 2 green; 14 blue, 2 green
+Game 59: 9 green, 2 blue, 5 red; 9 red, 5 green; 10 red, 1 blue, 8 green
+Game 60: 8 blue, 6 red, 4 green; 3 red, 12 green, 9 blue; 4 blue, 5 red, 5 green; 4 red, 8 blue; 7 green, 12 blue, 6 red
+Game 61: 5 blue, 13 red, 1 green; 5 red, 5 blue; 1 red, 3 blue; 1 green, 9 red; 10 red, 3 blue, 1 green
+Game 62: 1 blue, 13 red; 4 blue, 5 red; 11 blue, 8 red, 1 green
+Game 63: 14 blue, 5 red; 9 blue, 14 green, 5 red; 3 red, 8 green, 15 blue; 4 blue, 15 green, 6 red
+Game 64: 13 red, 6 blue, 11 green; 12 red, 1 blue, 8 green; 1 red, 17 green; 13 red, 12 green, 7 blue
+Game 65: 4 red, 17 blue, 3 green; 2 green, 12 blue, 9 red; 2 green, 17 blue, 5 red; 1 red, 1 green, 4 blue; 9 red, 16 blue; 7 blue, 9 red
+Game 66: 10 blue, 10 green, 5 red; 10 green, 3 blue, 5 red; 1 red, 1 green, 10 blue; 2 green, 5 red, 20 blue; 8 blue, 11 green, 13 red; 2 green, 18 blue, 2 red
+Game 67: 6 red, 1 green; 5 red, 10 blue; 6 blue, 6 red
+Game 68: 4 green, 1 red, 5 blue; 5 red, 5 blue; 7 red, 6 green; 8 red, 1 blue
+Game 69: 2 blue, 11 red; 4 red, 6 green, 1 blue; 4 red, 1 blue, 14 green
+Game 70: 15 red, 8 blue, 5 green; 5 green, 2 red, 8 blue; 8 red, 3 green, 10 blue
+Game 71: 4 blue, 2 red; 12 green, 4 blue; 10 green
+Game 72: 3 blue, 4 green, 6 red; 6 red, 5 green, 8 blue; 10 red, 6 green, 5 blue; 1 green, 2 blue; 10 red, 5 blue, 4 green
+Game 73: 5 blue, 1 red; 1 green, 11 blue; 10 blue; 12 blue, 1 red; 1 red, 9 blue; 7 blue, 1 green, 1 red
+Game 74: 7 green, 6 blue, 7 red; 7 blue, 6 green, 15 red; 7 red, 5 blue, 1 green; 1 blue, 6 red, 8 green; 8 green, 14 red, 3 blue
+Game 75: 8 green, 3 red, 3 blue; 1 blue, 6 red, 7 green; 9 green, 3 blue; 3 blue, 9 green, 6 red; 4 blue, 1 red, 3 green; 4 green, 1 blue, 16 red
+Game 76: 4 blue, 3 green; 2 blue, 1 red, 6 green; 12 blue; 1 green, 14 blue
+Game 77: 5 green, 10 red, 11 blue; 3 red; 8 green, 6 red, 9 blue
+Game 78: 7 red, 7 green; 8 blue; 6 green, 7 red, 5 blue
+Game 79: 11 blue, 2 red, 4 green; 2 green, 3 red, 15 blue; 1 green, 15 blue, 1 red
+Game 80: 3 red, 17 green, 8 blue; 8 green, 10 blue; 4 green, 1 red, 14 blue
+Game 81: 17 green, 10 red, 10 blue; 9 green, 9 blue, 7 red; 11 red, 11 green, 4 blue; 15 blue, 5 red; 11 blue, 8 green, 15 red; 3 green, 16 red
+Game 82: 8 green, 9 blue, 1 red; 1 red, 8 green, 9 blue; 2 green, 12 blue
+Game 83: 2 green, 11 red, 20 blue; 20 blue, 1 green, 4 red; 2 green, 6 red, 20 blue; 17 blue, 10 red
+Game 84: 1 green, 9 red; 4 blue, 4 green; 1 green, 6 red, 14 blue
+Game 85: 5 red, 10 green, 9 blue; 8 blue, 3 green, 2 red; 4 blue, 14 green, 3 red; 5 red, 4 blue
+Game 86: 8 blue, 9 green, 5 red; 5 red, 10 green, 1 blue; 15 blue, 1 red, 2 green; 8 red, 8 blue, 10 green
+Game 87: 13 green, 2 red, 4 blue; 3 red, 11 green, 9 blue; 6 blue, 3 red, 12 green
+Game 88: 2 red, 7 blue, 3 green; 2 blue, 9 red; 9 red, 6 blue, 7 green; 6 green, 13 blue, 9 red; 6 green, 2 red, 15 blue; 1 red, 8 green, 7 blue
+Game 89: 11 red, 1 blue, 2 green; 6 blue, 5 green, 4 red; 15 red, 4 green, 5 blue; 11 red, 3 blue, 10 green; 6 blue, 13 green, 12 red
+Game 90: 2 red, 2 blue, 4 green; 2 red, 2 blue; 9 green, 1 red, 1 blue; 5 green, 1 red; 7 green, 2 red; 2 green, 1 blue
+Game 91: 5 blue, 3 red, 1 green; 1 red, 4 blue, 6 green; 6 blue, 6 green, 5 red
+Game 92: 16 green, 1 blue, 12 red; 18 green, 14 red, 1 blue; 16 red, 1 green; 4 blue, 16 red, 18 green
+Game 93: 9 red, 8 blue, 14 green; 1 blue, 1 green, 6 red; 4 blue, 4 red, 14 green
+Game 94: 11 green, 4 blue, 2 red; 1 red, 1 green, 1 blue; 4 red, 1 blue, 2 green
+Game 95: 5 blue, 2 red, 9 green; 5 blue, 8 green; 1 green, 15 blue; 5 red, 9 green, 5 blue; 3 green, 17 blue, 5 red
+Game 96: 2 green, 14 blue, 1 red; 3 green, 3 red, 14 blue; 2 red, 2 green, 13 blue
+Game 97: 2 green, 2 red; 2 blue, 1 green; 7 blue, 3 red
+Game 98: 2 red, 1 blue, 12 green; 2 blue, 10 green, 5 red; 11 green, 9 blue; 6 blue, 17 green; 7 blue, 9 green, 9 red; 1 red, 11 green, 9 blue
+Game 99: 2 green, 9 red, 1 blue; 3 green, 1 blue, 14 red; 5 green, 6 blue; 1 blue, 2 green, 3 red; 4 blue, 10 red, 1 green
+Game 100: 4 green, 4 blue, 15 red; 3 green, 1 red, 13 blue; 5 green, 5 blue, 10 red

src/main/resources/day3/README.md

@@ -0,0 +1,30 @@
+--- Day 3: Gear Ratios ---
+
+You and the Elf eventually reach a gondola lift station; he says the gondola lift will take you up to the water source, but this is as far as he can bring you. You go inside.
+
+It doesn't take long to find the gondolas, but there seems to be a problem: they're not moving.
+
+"Aaah!"
+
+You turn around to see a slightly-greasy Elf with a wrench and a look of surprise. "Sorry, I wasn't expecting anyone! The gondola lift isn't working right now; it'll still be a while before I can fix it." You offer to help.
+
+The engineer explains that an engine part seems to be missing from the engine, but nobody can figure out which one. If you can add up all the part numbers in the engine schematic, it should be easy to work out which part is missing.
+
+The engine schematic (your puzzle input) consists of a visual representation of the engine. There are lots of numbers and symbols you don't really understand, but apparently any number adjacent to a symbol, even diagonally, is a "part number" and should be included in your sum. (Periods (.) do not count as a symbol.)
+
+Here is an example engine schematic:
+
+    467..114..
+    ...*......
+    ..35..633.
+    ......#...
+    617*......
+    .....+.58.
+    ..592.....
+    ......755.
+    ...$.*....
+    .664.598..
+
+In this schematic, two numbers are not part numbers because they are not adjacent to a symbol: 114 (top right) and 58 (middle right). Every other number is adjacent to a symbol and so is a part number; their sum is 4361.
+
+Of course, the actual engine schematic is much larger. What is the sum of all of the part numbers in the engine schematic?

src/main/resources/day3/input.txt

@@ -0,0 +1,140 @@
+..224.....487...................718.....................378............................................284........310......313..........311.
+....*..............................*744....486*485......*......741......@...359.#666...439................*925....*......$..+........@......
+.235................758..440...........................251....*......262.....*..........*......................752......774.......515.......
+.........705%..@746........+..942*591.347.470...#..257.........637...........793.......299..../.....813....509......464......&.........688..
+.....82................................*.../..901.....*..................836.....&............814...*........*..............80...17*....*...
+.../...*...679.661.....299...........222.............875.....213...161............964...894.........998.....310....258.85...........735.586.
+.650..23..#......*.......................................760*........@./........................202...................*.....339.............
+..............598......#.....536....702*.........705..........793......957............./........*...935...........965.......................
+..................*.357...+.....@.......242.......*......283..*...=956.......118.......959...184...*..............*....401*527.....348...161
+.63=...955.523..77......978.846....849..........699..........790........=911.*.....87...............486.........914..............=..........
+.........*.........842......*.......*..................*127....................844...*....946.......................235...209@...710.735....
+...........@.........*.....144....226....298........560.....253.........431......*...586.......723..../...482.......&...................*...
+...........871../918........................+....................329*......%.....906.............*...350.....@...............365.......361..
+......................536............................+..793..........664.....739................507......289.....256%...73..*...............
+.356..834..............*.........96.939..............28.+....=..............*...........................*................$.553..........526.
+...*...*.............501..746....*..-.......=.................890.....+...701..............807........447......97$..%...........58......$...
+.891....346...699...........*.421......+....666......198*791......340.433............#...%...*.......................316........*.....%.....
+..............%........81.984...........462....................../..........116...711....963...$................380.......745...85....224...
+.........370......923..@.....................563...........188+.........326*...................67.815..............*582.....................
+.........*........-........#530.........489........59...................................................#.....57.........100.*.......441*161
+.637*....961...........118...........21*...........@..216+.........................+....432*.*309..64....992.......81......=.781.644........
+.....324.........126......*166...............&...................385*..............233............*................*..436...........*517....
+.88*.........390*................355..335...372....+254..............294...$589........&..803/.....38..-...........56..$....................
+....235.-.........+196...948....*........-................359.........................398.............608..../.................145..346.....
+........915.................-.485.945.................936*................114.............118...............490.536..............*.%........
+.663........61.......856..........+....343....859...............*345.......*...=862............711.............................313.....606..
+........23...$.....@..................*......................316.....529.362.............49......................307*791....................
+225...............281...#..222.....@..283..............675............*.........911*90..-.....914..%39....509...............................
+.......797*....$........23..../...895.............67.......164.896.....554.....................*............=..............460........181...
+...........211.474...............................@...........*....*201..........911.717.#....192.75..679...........$.........*.........=....
+....355.........................&.....................678.650......................*.....128.....*.....*.........925..230...105.............
+....*.......409#.......*897.....698....427.........+....*.......*...............................313...670..521.......*....&.............*308
+...838..335.................367........-..........325....233...224...950......688.....199.774.........................793.108........501....
+...........*..102..924.349...+..595....................................*................&..............395+.....................753.........
+.........318...*......*........*....676...759.154...................524...........908.........694.211................173...........*214..424
+....458........403...........958.98....*........*..............688......957...488..+...........*.../....................................*...
+.......*.............591...............218.....203.....196$.......+....*........*......................765......971......./....927*741..227.
+......592..%60.$.....*.....885/....287...............................474.........409......226.174.......@........*.....230..................
+...............162.169.................510..962..............17......................32@..*...*.................225....................-....
+.....880...................201.....823*........*...914.724.........89...&.......267=.....717.54.436..........60...............&.........69..
+710........601....306.287.....+.........65...308....&...=.../......*.....926..................................*........278.415......-.......
+..............*..*......&..........241.%...................827../.265.............662.678......@...#......@.....$......-............734.144.
+.............424..434.....701.....*........380*731.............24.................*...&........973..741....728..357.........................
+........304.................*...881................238.....740.........947........587...22...........................271*........603....@...
+...................266.....918....................*..........+.519.617..*...826..........*............./268..974.........486.376....*.295...
+...939.........363.*...............378..........302....586........*....740...=..........380........931...........................12.........
+...*..........-.....387...............*..588..............*..../...............315...................-...712..491.........956.....#.........
+.180.454...................104..661...91...*.............811....370......471...-....419....804..........*...................*...............
+.....*.......@../464........%..*............243.....578...................&..........*...........604..250.....784....750....998.............
+.....245....165.................771...................&.......#.691...768....654....261.........................*.......*............566....
+441..................91.....194.......643...932*............379.#....$.......*.................86.............940..263.638...........*......
+...+.............%.../.......#.........*........344...795..................991..........544....*..................*..........767...266......
+.......-..708..727.....191$......*.....698....=...................990................+.....*....308.......@......325.........*.........44...
+...18.397....=.....93.........649.900.........62....-........322.....*.......@......339....619..........404..........540........./....*.....
+..../...............%............................742............*...........196................874.205........96#..............203.224......
+.........704...727.................496.......*........135....769........./.................%....&....*.../..=.........757...................
+........*........*..424..........&........714.5........*...........@....884...............114.......674.144..83..........*302...........%...
+........29....179..*............104..................531....629.455..................473......300....................254..............640...
+..................296.......................................................1........*.......%..............548........*.....103............
+....381...........................365#..713.282.......%744....................../....709...#...=...431...$.*......*.....837.....*9.....*....
+......*.90.....347.179#...................%.......359..........92............304...*.....923.446.......385.699.....749..............193.206.
+....922.+.......*.......-197.....................*.......128........273....@.....758..............439...................650*54.736#.........
+................817..-..........152..594..949..807.......$...224...*.....124............889.......=...................................625...
+....139....667......239........*...........*.......387........%..806........../...........*..788....632...........=8......584-......*.%.....
+...........*.................280...........11.........*726............181......761..-....66.....%....-................64...........14.......
+............742.736.725..........708.667..........332.......828*750......-.........425.......................944.....*...................926
+.719...110...........*.....348...=..........121......*........................................*.......961.....*.......971...........+.......
+..../.....*629........830..*............91....&..241..491...930............561................889....*....710.333..............163...311....
+......%...................252.../..................*...........*270.......................165.....208.......*..................../.......694
+...914...126...267.183........952..$645......414.822................................69.......-..........=..112.464..267....359..........*...
+.............7*..........................806.../.....931.....*.....355..............*....928...........854.........-..............*993...101
+439.897...........%...........8......381...*........*....748..987....*............437.......*....954.......................*................
+.......*595....783........49.....110.$...675...8...60.....=........981........&..........730....*.............336.......120.790..........386
+............90..............*212...*..........*.......985.....153........*..12...912*383......665.....754.....-.....................950.....
+......790#.*........896@.........773....777..581..514*....910.....5.....579.............................=.......#.....................*.....
+...&.......496...........347..............*...............*...................../............................790..............334......912..
+692............609....&.......694..........693...213....620......695......871..385.......82..........785.......................*..163.......
+.........#....*......984.........*.................=............*.......................................*.545...-............978.....*......
+......971...477.............465......196*313..........447.......766......49.......126*480.............798......792..359*193...........837...
+................157...........+..................773.=..............752$....................447*565..........................*53............
+.384%..........@.........449............470..749...@.........@792..............138..527.......................339.....299.505...........287.
+......691........700........@......96..........*........721*.....................@....*...942......845........*......-.........713..........
+.....*......260/...*...........................491..452.....336.......................73....+..960..........238...........163$..&...=.@.....
+....689.............831...282....709.960.............=.............204............................#..............59...97..........199..111..
+........................$........../........-....498......................557....&...........972............450.............................
+.............653........476...398.........619...*.....*280..923..............*31..691.........*........=...*.....67......782................
+..............*....%..........*.........+......268...........&........428....................408....740....576....*.......*.........$.......
+....-../...734......317.114.332...795...743.........................-..=..908...........381.......................914...420.*647....528.....
+..284.825...............*......................721/.=929.........324.....*....167.561...*.....815*466.......................................
+..............389..304.480.......851..@....585..............942%......#.496....*....-.53................170....938*..........518............
+........368..*.....@..............*....941..+.......*...............930.........364.......522......................59.........+....$....652.
+...........+.963...................949...........828.784......860............*......420.....*..................*......548...........310.*...
+.....476...............*...............=...94.+..................&........589.833....*..426.940.....&.....959.993.&88....................398
+.......*................624....917...838..*...664.......721........................833...$.......672......$............19...................
+....350.......................&....=..............333.................707....................................240..336....=...746.263..$463..
+.........................-.........220.....663...../.............*849..#..631.....712....=.../...308.580.............*..........*...........
+.78@......../..........422....444.............*...............281............*...*....447..37.......*................814....................
+........./...788...810.........&..............369..985....-................92................................684...............74...........
+......279.........*......128/....464........#...../......944........978...............163..984*5.@............+.......165......*....285.....
+..................889.............*.......969........................%.......5......&....$........272....................*......374.........
+.........&..............@948..*..13.358........796.............632............*....789........91*..............*66........152...............
+........508...+..............3...........544.....$.517.....703....*774.......434............/....794........932.............................
+...$...........241.....74...........974..*...954............*.......................375..772...........218.........414...........*366....252
+.501..566...............*..........*....599.....#........256.....468@..942.101.........*..........156...*.............*.......998...........
+...../.............263.312....+..767..............#.........................*...&95..838.162=.....+....130.........583..544.......176.......
+............................936......826.......421.......-139.......982...893.......................*..................*........./..........
+.284.....=724...................661.$....694........85..........438.............51...............616.698.*36.....262......357+........224...
+....@..........491........+........................@......193......*596...........%../844...387.................$.....132.........%.........
+.......84..............362.................................*..98..........&................*....14....394..........$..............56........
+.........*432.....512................704......424.............*............74........196%..875...*.....*............132.......229...........
+..............723*.........568........*..108........672......55.172...217.........................289.427........................*..........
+.........#795.........214....*.336...94....*....988................%..&.............*86......*...............838&.......540.......902.......
+.922...........288........719.....*........845...&..558......#...................524......195.704.....................................77....
+...*....842....../...166........883...-................*503..451..305../....600............................900..280.....*169...586..........
+751....*.........../.*......944......116....416.........................877....*....418...194........644..*....=.....244..........#.....354.
+.......118......208...................................788...................826........$....$...207.....@..152...........893*608.......&....
+..948.......................203../....206.............*....341./977.916.........49...#........@....-............+385........................
+...*......266.................*...607...@.990......964..............-..........*.....340...697........62..............526.....-.............
+..675.....*..........612....604.............*..............492.884...........212...............*157....*...679.........*....706...716%.518..
+......103.749..989...*...................739..............$......=..=..................212..684.....35.......*.........785..............+...
+..343*......../.......680.....................*423.................476....&....420..............241..*......532.....+.......864$.....&......
+..................826........403..311...60.451.............+...........562....../.......306.......*..............420..................321...
+...241..............*...........+..=....@......*240.......845....@.........740.................968..389.177*...................640..........
+......*82...........963...211%...............38...............901.....404.........&..253..............-.....37.........218.501...*....320...
+....*...........................#215...264......298........................*970..801....*....569...............3.......*......%..859.*......
+.136.818...212...........91*72........*.........-...750.....775*728.29.270...............984.&...371..........*.........639..........670....
+...........*.../959................438.....524......*...943.........*................755...................162.................446#.........
+..........290.............751................*.....557..*...483.............421.........*............189.%................/.................
+....................9.786..-......835.......978........445.%..........350........860..662.......#...*....354........*.....682...............
+.117..57+....441...*....+............................................../............*.........88....142..........%.927......................
+...*...........*..402....................874.....734.926$../...............*633......219.84/............662...205...................334.....
+...981........367........338...332/.........=......*......119....375#.334.......146..............%.....$................384.............-511
+........165................=....................666.....................#..614.....-..%744..617.887.......848*..............................
+...........*.203.593...158....*..........152..............+817.....866.......&...............*......../.......904........701.165.80.........
+404..977.93..*....*....*...396.281......*....953....*................*.........116..97.70=..179....107..338................$...*....622.....
+......=.....445........................382.....*...672................859......*...%....................&..........-.571......717....*......
+..................240............175..........808..............225..........988............/604..............232.448..*..651......769.......
+.........569*....*........975*.....*....968..............585.....*................26.................................394....@.142...........
+......*......498..969.........360.666...%.........................919.......360........-.*.........%...................................484..
+...407................886...................................84......................933...101....58........839..425.........................

src/test/kotlin/day2/Day2Test.kt

@@ -5,7 +5,12 @@ import org.junit.jupiter.api.Test
 class Day2Test {
 
     @Test
-    fun readGames() {
+    fun sumOfCompatibleGames() {
-        assert(Day2.sumOfCompatibleGames(Hand(12, 13, 14)) == 8)
+        assert(Day2.sumOfCompatibleGames("src/test/resources/day2/input.txt", Hand(12, 13, 14)) == 8)
+    }
+
+    @Test
+    fun powerOfMinimumSetOfCubes() {
+        assert(Day2.powerOfMinimumSetOfCubes("src/test/resources/day2/input.txt") == 2286)
     }
 }

src/test/kotlin/day3/Day3Test.kt

@@ -0,0 +1,31 @@
+package day3
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+import kotlin.test.assertContentEquals
+
+class Day3Test {
+
+    @Test
+    fun readParts() {
+        assertEquals(4361, Day3.sumOfSelectedParts("src/test/resources/day3/input.txt"))
+    }
+
+    @Test
+    fun testReadParts() {
+        assertContentEquals(
+            listOf(467, 114, 35, 633, 617, 58, 592, 755, 664, 598),
+            Day3.readParts(Day3.readLines("src/test/resources/day3/input.txt")).map(Part::number)
+        )
+    }
+
+    @Test
+    fun testOnly114And58DropOut() {
+        assertContentEquals(
+            listOf(467, 35, 633, 617, 592, 755, 664, 598),
+            Day3.readLines("src/test/resources/day3/input.txt").let { lines ->
+                Day3.readParts(lines).filter { part -> part.isSelected(lines) }.map(Part::number)
+            }
+        )
+    }
+}

src/test/resources/day2/input.txt

@@ -0,0 +1,5 @@
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green

src/test/resources/day3/input.txt

@@ -0,0 +1,10 @@
+467..114..
+...*......
+..35..633.
+......#...
+617*......
+.....+.58.
+..592.....
+......755.
+...$.*....
+.664.598..