1 files changed, 49 insertions, 0 deletions
diff --git a/2015/15/puzzles.py b/2015/15/puzzles.py
new file mode 100644
index 0000000..506e11f
--- /dev/null
+++ b/2015/15/puzzles.py
@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+
+import itertools
+import re
+from math import prod
+
+
+def main() -> None:
+	data: list[list[int]] = []
+	with open("input", "r", encoding="utf-8") as f:
+		for line in f.readlines():
+			m = re.match(
+				# START PART 1
+				r"[^\-0-9]+([\-0-9]+)[^\-0-9]+([\-0-9]+)[^\-0-9]+([\-0-9]+)[^\-0-9]+([\-0-9]+)",
+				# END PART 1
+				# START PART 2
+				r"[^\-0-9]+([\-0-9]+)[^\-0-9]+([\-0-9]+)[^\-0-9]+([\-0-9]+)[^\-0-9]+([\-0-9]+)[^\-0-9]+([0-9]+)",
+				# END PART 2
+				line,
+			)
+			data.append(list(map(int, [m.group(i) for i in range (1, GROUPS)])))
+
+	total = 0
+	for i in range(100):
+		for j in range(100 - i):
+			for k in range(100 - i - j):
+				if i + j + k > 100:
+					continue
+				h = 100 - i - j - k
+				# START PART 2
+				if data[0][4] * i + data[1][4] * j + data[2][4] * k + data[3][4] * h != 500:
+					continue
+				# END PART 2
+
+				parts = [
+					data[0][0] * i + data[1][0] * j + data[2][0] * k + data[3][0] * h,
+					data[0][1] * i + data[1][1] * j + data[2][1] * k + data[3][1] * h,
+					data[0][2] * i + data[1][2] * j + data[2][2] * k + data[3][2] * h,
+					data[0][3] * i + data[1][3] * j + data[2][3] * k + data[3][3] * h,
+				]
+
+				if not any(map(lambda x: x < 0, parts)):
+					total = max(total, prod(parts))
+
+	print(total)
+
+
+if __name__ == "__main__":
+	main()