Solve 2024 day 3

2024/d2.py

@@ -0,0 +1,42 @@
+from lib import get_data
+from lib import ints
+
+
+data = get_data(__file__)
+
+s1 = 0
+s2 = 0
+
+for line in data.splitlines():
+    xs = ints(line)
+
+    deltas = []
+    for i in range(len(xs) - 1):
+        deltas.append(xs[i + 1] - xs[i])
+        if abs(xs[i + 1] - xs[i]) not in [1, 2, 3]:
+            break
+    else:
+        if deltas[0] < 0 and all(deltas[i] < 0 for i in range(len(deltas))):
+            s1 += 1
+        elif deltas[0] > 0 and all(deltas[i] > 0 for i in range(len(deltas))):
+            s1 += 1
+
+    sublists = [xs[:i] + xs[i + 1 :] for i in range(len(xs))]
+    found = False
+    for xs in sublists:
+        deltas = []
+        for i in range(len(xs) - 1):
+            deltas.append(xs[i + 1] - xs[i])
+            if abs(xs[i + 1] - xs[i]) not in [1, 2, 3]:
+                break
+        else:
+            if deltas[0] < 0 and all(deltas[i] < 0 for i in range(len(deltas))):
+
+                found = True
+            if deltas[0] > 0 and all(deltas[i] > 0 for i in range(len(deltas))):
+                found = True
+    if found:
+        s2 += 1
+
+print(s1)
+print(s2)

2024/d3.py

@@ -0,0 +1,26 @@
+import re
+from lib import get_data
+from lib import ints
+
+
+data = get_data(__file__)
+
+t = 0
+r = re.compile(r'mul\(\d+,\d+\)')
+for match in r.findall(data):
+    a, b = ints(match)
+    t += a * b
+print(t)
+
+t = 0
+enabled = True
+for i in range(len(data.strip())):
+    m = r.match(data[i:])
+    if m and enabled:
+        a, b = ints(m.group())
+        t += a * b
+    elif data[i:].startswith("do()"):
+        enabled = True
+    elif data[i:].startswith("don't()"):
+        enabled = False
+print(t)

README.md

@@ -291,5 +291,8 @@ and focus. Of course, learning more algorithms and techniques helps.
 
 ## AoC 2024
 
-- Day 1: 1:30/2:49 (124th/141th)
-- Day 2:
+- Day 1: `00:01:30   124      0   00:02:49   141      0`
+- Day 2: `00:05:34   686      0   00:08:21   531      0`
+- Day 3: `00:01:48   165      0   00:02:40    56     45`
+- Day 4:
+