Tested one puzzle.

Change-Id: I60720151667814f13881e16868d570282e509c77

src/Utils.kt

@@ -8,6 +8,25 @@ import java.security.MessageDigest
 fun readInput(name: String) = File("src", "$name.txt")
     .readLines()
 
+fun listOfIntegerLists(input: List<String>): ArrayList<List<Int>> {
+    val output = ArrayList<List<Int>>()
+    var currList = ArrayList<Int>()
+    for(i in input)
+    {
+        if(i.isEmpty()){
+            output.add(currList)
+            currList = ArrayList<Int>()
+        } else {
+            currList.add(i.toInt())
+        }
+    }
+    if(currList.isNotEmpty())
+    {
+        output.add(currList)
+    }
+    return output
+}
+
 /**
  * Converts string to md5 hash.
  */

src/aoc2022/Day01.kt

@@ -0,0 +1,23 @@
+package aoc2022
+
+import listOfIntegerLists
+import println
+import readInput
+
+fun main() {
+    fun part1(input: List<String>): Int {
+        return listOfIntegerLists(input).map { it.sum() }.max()
+    }
+
+    fun part2(input: List<String>): Int {
+        return listOfIntegerLists(input).map { it.sum() }.sortedDescending().take(3).sum()
+    }
+
+    // test if implementation meets criteria from the description, like:
+    val testInput = readInput("Day01")
+    check(part1(testInput) == 69836)
+
+    val input = readInput("Day01")
+    part1(input).println()
+    part2(input).println()
+}