diff --git a/2024/src/main/kotlin/day17.kt b/2024/src/main/kotlin/day17.kt
index 35f9007..4a674f6 100644
--- a/2024/src/main/kotlin/day17.kt
+++ b/2024/src/main/kotlin/day17.kt
@@ -6,8 +6,14 @@ Register C: 0
 Program: 2,4,1,3,7,5,1,5,0,3,4,1,5,5,3,0
  */
 
-class Computer(var a: Int = 0, var b: Int = 0, var c: Int = 0, var ip: Int = 0, val memory: List<Int>) {
-    val output = mutableListOf<Int>()
+class Computer(
+    var a: Int = 0,
+    var b: Int = 0,
+    var c: Int = 0,
+    private var ip: Int = 0,
+    val memory: List<Int>
+) {
+    private val output = mutableListOf<Int>()
 
     fun run(): List<Int> {
         ip = 0
@@ -21,6 +27,7 @@ class Computer(var a: Int = 0, var b: Int = 0, var c: Int = 0, var ip: Int = 0,
                 3 -> if (a != 0) {
                     ip = literalOperand() - 2
                 }
+
                 4 -> b = b xor c
                 5 -> output.add(comboOperand() and 7)
                 6 -> b = a / (1 shl comboOperand())
@@ -32,7 +39,7 @@ class Computer(var a: Int = 0, var b: Int = 0, var c: Int = 0, var ip: Int = 0,
         return output.toList()
     }
 
-    private fun comboOperand(): Int = when(val value = memory[ip + 1]) {
+    private fun comboOperand(): Int = when (val value = memory[ip + 1]) {
         0, 1, 2, 3 -> value
         4 -> a
         5 -> b
@@ -45,7 +52,7 @@ class Computer(var a: Int = 0, var b: Int = 0, var c: Int = 0, var ip: Int = 0,
 }
 
 fun main() {
-    val computer = Computer(a = 21539243, memory = listOf(2,4,1,3,7,5,1,5,0,3,4,1,5,5,3,0))
+    val computer = Computer(a = 21539243, memory = listOf(2, 4, 1, 3, 7, 5, 1, 5, 0, 3, 4, 1, 5, 5, 3, 0))
     val output = computer.run().joinToString(separator = ",")
     println("Part 1: $output")
 }
\ No newline at end of file