diff --git a/arrays_and_strings/array-merge-inplace.py b/arrays_and_strings/array-merge-inplace.py
index 24d85e8..3f14658 100644
--- a/arrays_and_strings/array-merge-inplace.py
+++ b/arrays_and_strings/array-merge-inplace.py
@@ -1,3 +1,7 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
 """
 You are given two integer arrays nums1 and nums2, sorted in non-decreasing order, and two 
 integers m and n, representing the number of elements in nums1 and nums2 respectively.
@@ -50,4 +54,4 @@ if __name__ == "__main__":
 
         merge(nums1, m, nums2, n)
         print(nums1)
-        # [1,2,2,3,5,6]
\ No newline at end of file
+        # [1,2,2,3,5,6]