From 60da55c614df4eb4517bce8359655650f91dd556 Mon Sep 17 00:00:00 2001
From: alexo <the.onga@gmail.com>
Date: Sun, 24 Dec 2023 15:30:55 +1100
Subject: [PATCH] day12: comments

---
 day12/day12.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/day12/day12.py b/day12/day12.py
index cdedfb5..bcd7a2f 100644
--- a/day12/day12.py
+++ b/day12/day12.py
@@ -53,6 +53,13 @@ def set_and_return(self, state: State, value: int) -> int:
         return value
 
     def calculate_recursive(self, state: State) -> int:
+        """
+        Recursive with memoization
+        1. memoized
+        2. state.empty -> return if we are valid
+        3. state[0] == "." chop it and continue
+        4. state[0] == "#". get next number, and "enforce" it, chopping things. If anything is wrong, fail
+        """
         if state in self.big_cache:
             return self.big_cache[state]
         if len(state.items) == 0: