diff --git a/2025/03/example2 b/2025/03/example2
new file mode 100644
index 0000000..ce3e9ef
--- /dev/null
+++ b/2025/03/example2
@@ -0,0 +1 @@
+234234234234278
\ No newline at end of file
diff --git a/2025/03/main.py b/2025/03/main.py
index f966302..5c15f80 100644
--- a/2025/03/main.py
+++ b/2025/03/main.py
@@ -1,6 +1,4 @@
 #!/bin/env python3
-
-
 def turn_on_batteries(series: str, amount: int) -> list:
     batteries = list(series.strip())
     batteries.sort(reverse=True)
@@ -22,11 +20,30 @@ def turn_on_batteries(series: str, amount: int) -> list:
     return [highest, second_highest]
 
 
-with open("example", "+r") as file:
+def turn_on_batteries2(series: str, amount: int) -> list:
+
+    length = series.strip().__len__()
+
+    remaining = length - amount
+    new_stack: list = []
+
+    for battery in series.strip():
+        while remaining > 0 and new_stack and new_stack[-1] < battery:
+            new_stack.pop()
+            remaining -= 1
+        new_stack.append(battery)
+
+    if remaining > 0:
+        new_stack = new_stack[:-remaining]
+
+    return new_stack
+
+
+with open("input", "+r") as file:
     result = 0
     for line in file.readlines():
-        batteries = turn_on_batteries(line, 2)
-        print(line.strip(), batteries)
+        batteries = turn_on_batteries2(line, 12)
+        print("result:", line.strip(), "".join(batteries))
         result = result + int("".join(batteries))
 
     print("result:", result)