From fab48997158673d0b24bbd2ed531b4edc5d18967 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mika=C3=ABl=20Capelle?= <capelle.mikael@gmail.com>
Date: Sat, 6 Jan 2024 15:45:54 +0100
Subject: [PATCH] 2015 day 17.

---
 src/holt59/aoc/2015/day17.py                | 30 +++++++++++++++++++++
 src/holt59/aoc/inputs/holt59/2015/day17.txt | 20 ++++++++++++++
 src/holt59/aoc/inputs/tests/2015/day17.txt  |  5 ++++
 3 files changed, 55 insertions(+)
 create mode 100644 src/holt59/aoc/2015/day17.py
 create mode 100644 src/holt59/aoc/inputs/holt59/2015/day17.txt
 create mode 100644 src/holt59/aoc/inputs/tests/2015/day17.txt

diff --git a/src/holt59/aoc/2015/day17.py b/src/holt59/aoc/2015/day17.py
new file mode 100644
index 0000000..e4704c3
--- /dev/null
+++ b/src/holt59/aoc/2015/day17.py
@@ -0,0 +1,30 @@
+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}")
diff --git a/src/holt59/aoc/inputs/holt59/2015/day17.txt b/src/holt59/aoc/inputs/holt59/2015/day17.txt
new file mode 100644
index 0000000..6b25a72
--- /dev/null
+++ b/src/holt59/aoc/inputs/holt59/2015/day17.txt
@@ -0,0 +1,20 @@
+33
+14
+18
+20
+45
+35
+16
+35
+1
+13
+18
+13
+50
+44
+48
+6
+24
+41
+30
+42
diff --git a/src/holt59/aoc/inputs/tests/2015/day17.txt b/src/holt59/aoc/inputs/tests/2015/day17.txt
new file mode 100644
index 0000000..77f10f3
--- /dev/null
+++ b/src/holt59/aoc/inputs/tests/2015/day17.txt
@@ -0,0 +1,5 @@
+20
+15
+10
+5
+5