From c93fc1b9a11c96a4554ec47029bf085597fdef60 Mon Sep 17 00:00:00 2001
From: Thomas Voss <thomasvoss@live.com>
Date: Sun, 12 Dec 2021 06:46:33 +0100
Subject: Fix defaultdict typehint and use default func args

---
 2021/12/puzzle-1.py | 32 ++++++++++++++++++++++++++++++++
 2021/12/puzzle-2.py | 37 +++++++++++++++++++++++++++++++++++++
 2021/12/puzzles.py  | 14 +++++++-------
 3 files changed, 76 insertions(+), 7 deletions(-)
 create mode 100755 2021/12/puzzle-1.py
 create mode 100755 2021/12/puzzle-2.py

diff --git a/2021/12/puzzle-1.py b/2021/12/puzzle-1.py
new file mode 100755
index 0000000..1ec9f51
--- /dev/null
+++ b/2021/12/puzzle-1.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+
+from collections import defaultdict
+
+
+def solve(paths: defaultdict[list[str]], path: str, flag: bool = False) -> int:
+	acc = 0
+	tokens = path.split(",")
+
+	for dest in paths[tokens[-1]]:
+		if dest == "end":
+			acc += 1
+		# START PART 1
+		elif not (dest.islower() and dest in tokens):
+			acc += solve(paths, f"{path},{dest}")
+
+	return acc
+
+
+def main() -> None:
+	paths: defaultdict[list[str]] = defaultdict(list)
+	with open("input", "r", encoding="utf-8") as f:
+		for entry in f.readlines():
+			x, y = entry.strip().split("-")
+			paths[x].append(y)
+			paths[y].append(x)
+
+	print(solve(paths, "start", False))
+
+
+if __name__ == "__main__":
+	main()
diff --git a/2021/12/puzzle-2.py b/2021/12/puzzle-2.py
new file mode 100755
index 0000000..d5c6f68
--- /dev/null
+++ b/2021/12/puzzle-2.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+from collections import defaultdict
+
+
+def solve(paths: defaultdict[str, list[str]], path: str, flag: bool = False) -> int:
+	acc = 0
+	tokens = path.split(",")
+
+	for dest in paths[tokens[-1]]:
+		if dest == "end":
+			acc += 1
+		elif dest != "start":
+			if dest.islower() and dest in tokens:
+				if flag:
+					continue
+				acc += solve(paths, f"{path},{dest}", True)
+			else:
+				acc += solve(paths, f"{path},{dest}", flag)
+		# END PART 2
+
+	return acc
+
+
+def main() -> None:
+	paths: defaultdict[str, list[str]] = defaultdict(list)
+	with open("input", "r", encoding="utf-8") as f:
+		for entry in f.readlines():
+			x, y = entry.strip().split("-")
+			paths[x].append(y)
+			paths[y].append(x)
+
+	print(solve(paths, "start", False))
+
+
+if __name__ == "__main__":
+	main()
diff --git a/2021/12/puzzles.py b/2021/12/puzzles.py
index 8cfc506..2194c49 100644
--- a/2021/12/puzzles.py
+++ b/2021/12/puzzles.py
@@ -3,24 +3,24 @@
 from collections import defaultdict
 
 
-def solve(paths: defaultdict[list[str]], path: str) -> int:
+def solve(paths: defaultdict[list[str]], path: str, flag: bool = False) -> int:
 	acc = 0
-	tokens = path[0].split(",")
+	tokens = path.split(",")
 
 	for dest in paths[tokens[-1]]:
 		if dest == "end":
 			acc += 1
 		# START PART 1
 		elif not (dest.islower() and dest in tokens):
-			acc += solve(paths, (f"{path[0]},{dest}", False))
+			acc += solve(paths, f"{path},{dest}")
 		# END PART 1 START PART 2
 		elif dest != "start":
 			if dest.islower() and dest in tokens:
-				if path[1]:
+				if flag:
 					continue
-				acc += solve(paths, (f"{path[0]},{dest}", True))
+				acc += solve(paths, f"{path},{dest}", True)
 			else:
-				acc += solve(paths, (f"{path[0]},{dest}", path[1]))
+				acc += solve(paths, f"{path},{dest}", flag)
 		# END PART 2
 
 	return acc
@@ -34,7 +34,7 @@ def main() -> None:
 			paths[x].append(y)
 			paths[y].append(x)
 
-	print(solve(paths, ("start", False)))
+	print(solve(paths, "start", False))
 
 
 if __name__ == "__main__":
-- 
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