2015 day 17.

src/holt59/aoc/2015/day17.py

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+import sys
+from typing import Iterator
+
+
+def iter_combinations(value: int, containers: list[int]) -> Iterator[tuple[int, ...]]:
+    if value < 0:
+        return
+
+    if value == 0:
+        yield ()
+
+    for i in range(len(containers)):
+        for combination in iter_combinations(
+            value - containers[i], containers[i + 1 :]
+        ):
+            yield (containers[i],) + combination
+
+
+containers = [int(c) for c in sys.stdin.read().split()]
+total = 25 if len(containers) <= 5 else 150
+
+combinations = [combination for combination in iter_combinations(total, containers)]
+
+answer_1 = len(combinations)
+print(f"answer 1 is {answer_1}")
+
+min_containers = min(len(combination) for combination in combinations)
+
+answer_2 = sum(1 for combination in combinations if len(combination) == min_containers)
+print(f"answer 2 is {answer_2}")

src/holt59/aoc/inputs/holt59/2015/day17.txt

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+33
+14
+18
+20
+45
+35
+16
+35
+1
+13
+18
+13
+50
+44
+48
+6
+24
+41
+30
+42

src/holt59/aoc/inputs/tests/2015/day17.txt

@@ -0,0 +1,5 @@
+20
+15
+10
+5
+5