diff --git a/day11.py b/day11.py
new file mode 100644
index 0000000..126d03c
--- /dev/null
+++ b/day11.py
@@ -0,0 +1,44 @@
+from tools.aoc import AOCDay
+from tools.math import magnitude
+from typing import Any
+
+
+class Day(AOCDay):
+    inputs = [
+        [
+            (55312, "input11_test"),
+            (203228, "input11"),
+        ],
+        [
+            (240884656550923, "input11"),
+        ],
+    ]
+
+    def iter_stone(self, stone: int, times: int) -> int:
+        if times == 0:
+            return 1
+
+        if (stone, times) in self.DP:
+            return self.DP[(stone, times)]
+
+        if stone == 0:
+            result = self.iter_stone(1, times - 1)
+        elif magnitude(stone) % 2 == 1:
+            div = magnitude(stone) // 2 + 1
+            result = self.iter_stone(stone % (10**div), times - 1) + self.iter_stone(stone // (10**div), times - 1)
+        else:
+            result = self.iter_stone(stone * 2024, times - 1)
+
+        self.DP[(stone, times)] = result
+        return result
+
+    def part1(self) -> Any:
+        return sum(self.iter_stone(x, 25) for x in map(int, self.getInput().split()))
+
+    def part2(self) -> Any:
+        return sum(self.iter_stone(x, 75) for x in map(int, self.getInput().split()))
+
+
+if __name__ == "__main__":
+    day = Day(2024, 11)
+    day.run(verbose=True)
diff --git a/inputs/input11 b/inputs/input11
new file mode 100644
index 0000000..59ce7f2
--- /dev/null
+++ b/inputs/input11
@@ -0,0 +1 @@
+17639 47 3858 0 470624 9467423 5 188
diff --git a/inputs/input11_test b/inputs/input11_test
new file mode 100644
index 0000000..528f9d5
--- /dev/null
+++ b/inputs/input11_test
@@ -0,0 +1 @@
+125 17
\ No newline at end of file