2 files changed, 30 insertions, 0 deletions
diff --git a/src/Day01.kt b/src/Day01.kt
new file mode 100644
index 0000000..35b4e09
--- /dev/null
+++ b/src/Day01.kt
@@ -0,0 +1,17 @@
+fun main() {
+    fun part1(input: List<String>): Int {
+        return input.size
+    }
+
+    fun part2(input: List<String>): Int {
+        return input.size
+    }
+
+    // test if implementation meets criteria from the description, like:
+    val testInput = readInput("Day01_test")
+    check(part1(testInput) == 1)
+
+    val input = readInput("Day01")
+    println(part1(input))
+    println(part2(input))
+}
diff --git a/src/Utils.kt b/src/Utils.kt
new file mode 100644
index 0000000..acfb72a
--- /dev/null
+++ b/src/Utils.kt
@@ -0,0 +1,13 @@
+import java.io.File
+import java.math.BigInteger
+import java.security.MessageDigest
+
+/**
+ * Reads lines from the given input txt file.
+ */
+fun readInput(name: String) = File("src", "$name.txt").readLines()
+
+/**
+ * Converts string to md5 hash.
+ */
+fun String.md5(): String = BigInteger(1, MessageDigest.getInstance("MD5").digest(toByteArray())).toString(16)