diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9b7ba47
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,18 @@
+# Created by https://www.toptal.com/developers/gitignore/api/venv
+# Edit at https://www.toptal.com/developers/gitignore?templates=venv
+
+### venv ###
+# Virtualenv
+# http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
+.Python
+[Bb]in
+[Ii]nclude
+[Ll]ib
+[Ll]ib64
+[Ll]ocal
+[Ss]cripts
+pyvenv.cfg
+.venv
+pip-selfcheck.json
+
+# End of https://www.toptal.com/developers/gitignore/api/venv
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..dffe746
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Shaporova-Nadya
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/src/fast_pow.py b/src/fast_pow.py
index 1ba1dc1..b17fa05 100644
--- a/src/fast_pow.py
+++ b/src/fast_pow.py
@@ -1,6 +1,12 @@
 def fastPow(number, power):
-    result = number
-    while power != 1:
-        result *= result
-        power = power // 2
+    if power < 0:
+        return 1
+    result = 1
+
+    while power > 0:
+        if power % 2 == 1:
+            result *= number
+        number *= number
+        power //= 2
+
     return result
diff --git a/test/test_fast_pow.py b/test/test_fast_pow.py
index 5e4aebd..ac5b5ef 100644
--- a/test/test_fast_pow.py
+++ b/test/test_fast_pow.py
@@ -1,9 +1,11 @@
-from src.fast_pow import fastPow
-
+import pytest
+from fast_pow import fastPow
 
 def test_two_power_two():
     assert fastPow(2, 2) == 4
 
-
 def test_negative():
-    assert fastPow(-1, 4) == 1
+    assert fastPow(256, 0) == 1
+
+def test_neg():
+    assert fastPow(2, -4) == 1