1 files changed, 52 insertions, 0 deletions
diff --git a/2015/07/puzzles.py b/2015/07/puzzles.py
new file mode 100644
index 0000000..37347c7
--- /dev/null
+++ b/2015/07/puzzles.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+
+# START PART 2
+from copy import deepcopy
+# END PART 2
+
+from numpy import uint16
+
+
+recipes: dict[str, list[str] | uint16] = {}
+
+
+def solve(wire: str) -> uint16:
+	if wire.isdigit():
+		return int(wire)
+	if type(recipes[wire]) == uint16:
+		return recipes[wire]
+
+	match recipes[wire]:
+		case [x]:
+			recipes[wire] = solve(x)
+		case ["NOT", x]:
+			recipes[wire] = ~solve(x)
+		case [x, "AND", y]:
+			recipes[wire] = solve(x) & solve(y)
+		case [x, "OR", y]:
+			recipes[wire] = solve(x) | solve(y)
+		case [x, "LSHIFT", y]:
+			recipes[wire] = solve(x) << solve(y)
+		case [x, "RSHIFT", y]:
+			recipes[wire] = solve(x) >> solve(y)
+
+	return recipes[wire]
+
+
+def main() -> None:
+	global recipes
+	with open("input", "r", encoding="utf-8") as f:
+		for line in f.readlines():
+			line = line.strip().split(" ")
+			recipes[line[-1]] = line[:-2]
+
+	# START PART 2
+	backup = deepcopy(recipes)
+	backup["b"] = solve("a")
+	recipes = backup
+	# END PART 2
+	print(solve("a"))
+
+
+if __name__ == "__main__":
+	main()