2024 day 11 parts 1

README.md

@@ -15,7 +15,7 @@
 - 2021 - ★★★★★ ★★★★★ ★★★★★ ★★★
 - 2022 - ★★★★★ ★★★★★ ★★★★★ ★☆
 - 2023 - ★★★★★ ★★★★★ ★★★★★ ★★★☆
-- 2024 - ★★★★★ ★★★★★
+- 2024 - ★★★★★ ★★★★★ ☆
 
 ## How to use
 

src/year2024/day11a.py

@@ -0,0 +1,26 @@
+"""2024 - Day 11 Part 1: Plutonian Pebbles"""
+
+
+def solve(task: str) -> int:
+    stones = [int(x) for x in task.split()]
+
+    for _ in range(25):
+        new_stones: list[int] = []
+
+        for stone in stones:
+            if stone == 0:
+                new_stones.append(1)
+            elif (len_stone := len(str_stone := str(stone))) % 2 == 0:
+                middle = len_stone // 2
+
+                left = str_stone[:middle]
+                right = str_stone[middle:]
+
+                new_stones.append(int(left))
+                new_stones.append(int(right))
+            else:
+                new_stones.append(stone * 2024)
+
+        stones = new_stones
+
+    return len(stones)

tests/src/year2024/test_day11a.py

@@ -0,0 +1,8 @@
+"""2024 - Day 11 Part 1: Plutonian Pebbles"""
+
+from src.year2024.day11a import solve
+
+
+def test_solve():
+    task = "125 17"
+    assert solve(task) == 55312