diff --git a/bit_manipulation/sum_with_bitwise.py b/bit_manipulation/sum_with_bitwise.py
index 282fe8b..cb0b004 100644
--- a/bit_manipulation/sum_with_bitwise.py
+++ b/bit_manipulation/sum_with_bitwise.py
@@ -1,3 +1,8 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
+
 def get_sum(self, a: int, b: int) -> int:
         
        if a == -b: