Solve 2024 day 19

2024/d19.py

@@ -0,0 +1,30 @@
+from lib import get_data
+from functools import cache
+
+data = get_data(__file__)
+lines = data.splitlines()
+patterns = set(lines[0].split(", "))
+
+
+@cache
+def valid(line):
+    if line == "":
+        return 1
+    r = 0
+    for j in range(1, len(line) + 1):
+        sub = line[:j]
+        if sub in patterns:
+            r += valid(line[j:])
+    return r
+
+
+p1, p2 = 0, 0
+lines = lines[2:]
+for line in lines:
+    v = valid(line.strip())
+    if v > 0:
+        p1 += 1
+        p2 += v
+
+print(p1)
+print(p2)

README.md

@@ -309,5 +309,6 @@ and focus. Of course, learning more algorithms and techniques helps.
 - Day 16: `   >24h  24941      0       >24h  20575      0`
 - Day 17: `17:34:16 23722      0       >24h  17778      0`
 - Day 18: `14:35:01 20398      0   14:37:18  19550      0`
-- Day 19:
+- Day 19: `00:14:37  2001      0   00:19:43   1584      0`
+- Day 20: