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Day 17 part 1

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This commit is contained in:
Sven Weidauer 2024-12-25 12:03:20 +01:00
parent 5c47d18647
commit 598e8bd639
1 changed files with 11 additions and 4 deletions
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15
2024/src/main/kotlin/day17.kt
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@ -6,8 +6,14 @@ Register C: 0
Program: 2,4,1,3,7,5,1,5,0,3,4,1,5,5,3,0 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>) { class Computer(
val output = mutableListOf<Int>() 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> { fun run(): List<Int> {
ip = 0 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) { 3 -> if (a != 0) {
ip = literalOperand() - 2 ip = literalOperand() - 2
} }
4 -> b = b xor c 4 -> b = b xor c
5 -> output.add(comboOperand() and 7) 5 -> output.add(comboOperand() and 7)
6 -> b = a / (1 shl comboOperand()) 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() 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 0, 1, 2, 3 -> value
4 -> a 4 -> a
5 -> b 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() { 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 = ",") val output = computer.run().joinToString(separator = ",")
println("Part 1: $output") println("Part 1: $output")
} }