diff --git a/src/day15/Puzzle1.scala b/src/day15/Puzzle1.scala
new file mode 100644
index 0000000..fc5a220
--- /dev/null
+++ b/src/day15/Puzzle1.scala
@@ -0,0 +1,42 @@
+package day15
+
+import scala.io.{BufferedSource, Source}
+
+object Puzzle1 {
+  var values: Array[String] = Array.empty
+  def loadInput(path: String): Unit = {
+    val source: BufferedSource = Source.fromFile(path)
+    val line: String = source.getLines().mkString
+
+    values = line.split(",")
+
+    source.close()
+  }
+
+  def hash(str: String): Int = {
+    var value: Int = 0
+    for (c: Char <- str) {
+      value += c
+      value *= 17
+      value %= 256
+    }
+    return value
+  }
+
+  def solve(path: String): Int = {
+    loadInput(path)
+
+    var solution: Int = 0
+
+    for (value: String <- values) {
+      solution += hash(value)
+    }
+
+    return solution
+  }
+
+  def main(args: Array[String]): Unit = {
+    val solution: Int = solve("./res/day15/input1.txt")
+    println(solution)
+  }
+}
diff --git a/tests/day15/Puzzle1Test.scala b/tests/day15/Puzzle1Test.scala
new file mode 100644
index 0000000..e48ca5f
--- /dev/null
+++ b/tests/day15/Puzzle1Test.scala
@@ -0,0 +1,9 @@
+package day15
+
+import org.scalatest.funsuite.AnyFunSuite
+
+class Puzzle1Test extends AnyFunSuite {
+  test("Puzzle1.solve") {
+    assert(Puzzle1.solve("tests_res/day15/input1.txt") == 1320)
+  }
+}
diff --git a/tests_res/day15/input1.txt b/tests_res/day15/input1.txt
new file mode 100644
index 0000000..62f7ed0
--- /dev/null
+++ b/tests_res/day15/input1.txt
@@ -0,0 +1 @@
+rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7
\ No newline at end of file