From a44bd51f68aa52bcbac916109996c5d1ab4ea8ec Mon Sep 17 00:00:00 2001
From: Stefan Harmuth <pennywise@drock.de>
Date: Sun, 4 Dec 2022 12:18:54 +0100
Subject: [PATCH] day23 - for p2 I'm guessing what number is changing between
 inputs

---
 day23.py       | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++
 inputs/input23 | 32 +++++++++++++++++++++++
 2 files changed, 101 insertions(+)
 create mode 100644 day23.py
 create mode 100644 inputs/input23

diff --git a/day23.py b/day23.py
new file mode 100644
index 0000000..98b347b
--- /dev/null
+++ b/day23.py
@@ -0,0 +1,69 @@
+from collections import defaultdict
+
+from tools.aoc import AOCDay
+from typing import Any
+
+from tools.math import get_factors
+
+
+class Day(AOCDay):
+    inputs = [
+        [
+            (4225, "input23")
+        ],
+        [
+            (905, "input23")
+        ]
+    ]
+
+    def get_commands(self) -> list:
+        return [x.split(" ") for x in self.getInput()]
+
+    def part1(self) -> Any:
+        register = defaultdict(int)
+        index = 0
+        commands = self.get_commands()
+        mul_count = 0
+        while 0 <= index < len(commands):
+            cmd = commands[index]
+
+            try:
+                value = int(cmd[2])
+            except ValueError:
+                value = register[cmd[2]]
+
+            match cmd[0]:
+                case "set":
+                    register[cmd[1]] = value
+                case "sub":
+                    register[cmd[1]] -= value
+                case "mul":
+                    mul_count += 1
+                    register[cmd[1]] *= value
+                case "jnz":
+                    try:
+                        jumper = int(cmd[1])
+                    except ValueError:
+                        jumper = register[cmd[1]]
+                    if jumper != 0:
+                        index += value - 1
+
+            index += 1
+
+        return mul_count
+
+    def part2(self) -> Any:
+        b = int(self.getInput()[0].split(" ")[2]) * 100 + 100000
+        c = b + 17000
+        h = 0
+        while b <= c:
+            if len(get_factors(b)) > 2:
+                h += 1
+            b += 17
+
+        return h
+
+
+if __name__ == '__main__':
+    day = Day(2017, 23)
+    day.run(verbose=True)
diff --git a/inputs/input23 b/inputs/input23
new file mode 100644
index 0000000..8155688
--- /dev/null
+++ b/inputs/input23
@@ -0,0 +1,32 @@
+set b 67
+set c b
+jnz a 2
+jnz 1 5
+mul b 100
+sub b -100000
+set c b
+sub c -17000
+set f 1
+set d 2
+set e 2
+set g d
+mul g e
+sub g b
+jnz g 2
+set f 0
+sub e -1
+set g e
+sub g b
+jnz g -8
+sub d -1
+set g d
+sub g b
+jnz g -13
+jnz f 2
+sub h -1
+set g b
+sub g c
+jnz g 2
+jnz 1 3
+sub b -17
+jnz 1 -23