Take functional python to the next level

1 files changed, 22 insertions, 7 deletions

diff --git a/2015/17/puzzle-2.py b/2015/17/puzzle-2.py
index 43f8922..50a70f9 100755
--- a/2015/17/puzzle-2.py
+++ b/2015/17/puzzle-2.py
@@ -7,13 +7,28 @@ def main() -> None:
 	with open("input", "r", encoding="utf-8") as f:
 		nums = list(map(int, f.readlines()))
 
-	combs: list[tuple[int, ...]] = []
-	for n in range(len(nums) + 1):
-		combs += list(itertools.combinations(nums, n))
-
-	combs = list(filter(lambda x: sum(x) == 150, combs))
-	conts = min(map(len, combs))
-	print(len(list(filter(lambda x: len(x) == conts, combs))))
+	print(
+		len(
+			list(
+				filter(
+					lambda x: len(x) == min(map(len, combs)),
+					(
+						combs := list(
+							filter(
+								lambda x: sum(x) == 150,
+								itertools.chain(
+									*[
+										list(itertools.combinations(nums, n))
+										for n in range(len(nums) + 1)
+									]
+								),
+							)
+						)
+					),
+				)
+			)
+		)
+	)
 
 
 if __name__ == "__main__":