Inline function to avoid passing arg

2024/src/aoc/days/day19.py

@@ -0,0 +1,36 @@
+import functools
+
+from . import CombinedRunner
+
+
+def parse_input(data: str) -> tuple[tuple[str, ...], list[str]]:
+    patterns, designs = data.strip().split("\n\n")
+
+    return tuple(patterns.split(", ")), designs.split("\n")
+
+
+class DayRunner(CombinedRunner):
+    @classmethod
+    def run_both(cls, input: str) -> int:
+        patterns, designs = parse_input(input)
+
+        possible = 0
+        ways = 0
+
+        @functools.cache
+        def is_possible(design: str) -> bool:
+            if not design:
+                return 1
+
+            return sum(
+                is_possible(design[len(pat) :])
+                for pat in patterns
+                if design.startswith(pat)
+            )
+
+        for design in designs:
+            if (solve := is_possible(design)) > 0:
+                possible += 1
+                ways += solve
+
+        return possible, ways

2024/tests/samples/19.txt

@@ -0,0 +1,10 @@
+r, wr, b, g, bwu, rb, gb, br
+
+brwrr
+bggr
+gbbr
+rrbgbr
+ubwu
+bwurrg
+brgr
+bbrgwb

2024/tests/test_day19.py

@@ -0,0 +1,11 @@
+from aoc.days.day19 import DayRunner
+
+from . import get_data
+
+
+def test_sample_part1() -> None:
+    assert DayRunner.part1(get_data(19)) == 6
+
+
+def test_sample_part2() -> None:
+    assert DayRunner.part2(get_data(19)) == 16