From e35d13c79571290242e8cc82023b0fef4f6e4919 Mon Sep 17 00:00:00 2001
From: Tom van der Lee <t0m.vd.l33@gmail.com>
Date: Sun, 11 Dec 2022 16:45:04 +0100
Subject: Day 11

---
 day11/__init__.py | 37 +++++++++++++++++++++++--------------
 1 file changed, 23 insertions(+), 14 deletions(-)

(limited to 'day11')

diff --git a/day11/__init__.py b/day11/__init__.py
index 7ed8fbc..f799afb 100644
--- a/day11/__init__.py
+++ b/day11/__init__.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 import dataclasses
 from abc import ABC
+from functools import reduce
 from typing import List, Iterator, Any, Tuple
 
 from aoc import BaseAssignment
@@ -13,12 +14,11 @@ class Monkey:
     test_divisible: int
     test_true: int
     test_false: int
-    worry_divider: int = 1
 
     inspections: int = 0
 
     @classmethod
-    def from_input(cls, lines: List[str], worry_divider: int):
+    def from_input(cls, lines: List[str]):
         _, items = lines[1].split(":")
 
         return cls(
@@ -27,7 +27,6 @@ class Monkey:
             test_divisible=int(lines[3].split(" ")[-1]),
             test_true=int(lines[4].split(" ")[-1]),
             test_false=int(lines[5].split(" ")[-1]),
-            worry_divider=worry_divider,
         )
 
     def new_worry_factor(self, item: int, worry_factor=1) -> int:
@@ -45,41 +44,46 @@ class Monkey:
             return self.test_true
         return self.test_false
 
-    def inspect_items(self) -> Iterator[Tuple[int, int]]:
+    def inspect_items(self, worry_divisor: int) -> Iterator[Tuple[int, int]]:
         for item in self.items:
             self.inspections += 1
-            new_worry_factor = self.new_worry_factor(item) // self.worry_divider
+            new_worry_factor = self.new_worry_factor(item) // worry_divisor
             yield new_worry_factor, self.throw_to(new_worry_factor)
 
         self.items = []
 
 
 class Assignment(BaseAssignment, ABC):
-    def parse_monkeys(self, input: Iterator[str], worry_divider: int):
+    def parse_monkeys(self, input: Iterator[str]):
         monkeys = []
         monkey = []
         for line in input:
             if line == "":
-                monkeys.append(Monkey.from_input(monkey, worry_divider))
+                monkeys.append(Monkey.from_input(monkey))
                 monkey = []
                 continue
 
             monkey.append(line)
 
         if len(monkey) != 0:
-            monkeys.append(Monkey.from_input(monkey, worry_divider))
+            monkeys.append(Monkey.from_input(monkey))
 
         return monkeys
 
     def calculate_monkey_business(
-        self, input: Iterator[str], rounds: int, worry_divider: int = 1
+        self,
+        monkeys: list[Monkey],
+        rounds: int,
+        worry_divisor: int = 1,
+        common_devisor: int = None,
     ):
-        monkeys = self.parse_monkeys(input, worry_divider)
 
         for _ in range(rounds):
             for monkey in monkeys:
-                for item, other_monkey in monkey.inspect_items():
-                    monkeys[other_monkey].items.append(item)
+                for item, other_monkey in monkey.inspect_items(worry_divisor):
+                    monkeys[other_monkey].items.append(
+                        item % common_devisor if common_devisor is not None else item
+                    )
 
         a, b = sorted([monkey.inspections for monkey in monkeys])[-2:]
 
@@ -90,11 +94,16 @@ class AssignmentOne(Assignment):
     example_result = 10605
 
     def run(self, input: Iterator) -> Any:
-        return self.calculate_monkey_business(input, 20, 3)
+        monkeys = self.parse_monkeys(input)
+        return self.calculate_monkey_business(monkeys, 20, worry_divisor=3)
 
 
 class AssignmentTwo(Assignment):
     example_result = 2713310158
 
     def run(self, input: Iterator) -> Any:
-        return self.calculate_monkey_business(input, 10000)
+        monkeys = self.parse_monkeys(input)
+        common_divisor = reduce(lambda c, m: c * m.test_divisible, monkeys, 1)
+        return self.calculate_monkey_business(
+            monkeys, 10000, common_devisor=common_divisor
+        )
-- 
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