From 25f8f8b2227c7f9d366f3786295ad85cdecc90d2 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <138282459+energyc0@users.noreply.github.com>
Date: Thu, 23 Oct 2025 13:45:58 +0300
Subject: [PATCH 01/17] Create LICENSE

---
 LICENSE | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 LICENSE

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..531fe4d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Maxim Gavrilov
+
+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.

From fe92c2913bd75b4da7e4deaddc2420d9c6ee212b Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 13:56:57 +0300
Subject: [PATCH 02/17] Changed function name and improved functionality
 fast_pow()

---
 src/fast_pow.py | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/fast_pow.py b/src/fast_pow.py
index 1ba1dc1..3fa87b0 100644
--- a/src/fast_pow.py
+++ b/src/fast_pow.py
@@ -1,6 +1,2 @@
-def fastPow(number, power):
-    result = number
-    while power != 1:
-        result *= result
-        power = power // 2
-    return result
+def fast_pow(number, power):
+    return number ** power

From db05ae67f188e45ad146d742b768d1281fc2e207 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 13:57:27 +0300
Subject: [PATCH 03/17] changed function name

---
 src/luhn.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/luhn.py b/src/luhn.py
index 11d993c..e978d51 100644
--- a/src/luhn.py
+++ b/src/luhn.py
@@ -1,4 +1,4 @@
-def luhnСheck(cardNumber):
+def luhn_check(cardNumber):
     digits = [int(d) for d in str(cardNumber) if d.isdigit()]
     control = digits.pop()
     parity = (len(digits))%2

From 9f6aae0b63d504e299e729ae4a8dcabbe6547c88 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 13:58:32 +0300
Subject: [PATCH 04/17] Changed tests according to new function names, added
 some fast_pow() tests.

---
 test/test_fast_pow.py | 20 +++++++++++++++++---
 test/test_luhn.py     |  6 +++---
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/test/test_fast_pow.py b/test/test_fast_pow.py
index 5e4aebd..06d0bf5 100644
--- a/test/test_fast_pow.py
+++ b/test/test_fast_pow.py
@@ -1,9 +1,23 @@
-from src.fast_pow import fastPow
+from src.fast_pow import fast_pow
 
 
 def test_two_power_two():
-    assert fastPow(2, 2) == 4
+    assert fast_pow(2, 2) == 4
 
 
 def test_negative():
-    assert fastPow(-1, 4) == 1
+    assert fast_pow(-1, 4) == 1
+    assert fast_pow(-2, 3) == -8
+
+def test_negative_power():
+    assert fast_pow(5,-1) == 0.2
+    assert fast_pow(10, -2) == 0.01
+    assert fast_pow(77, -5) == 77**(-5)
+
+    assert fast_pow(-0.2, -2) == 25
+    assert fast_pow(-0.2, -1) == 5
+
+def edge_cases():
+    assert fast_pow(1100101, 0) == 1
+    assert fast_pow(-13, 0) == 1
+    assert fast_pow(111, 0) == 1
diff --git a/test/test_luhn.py b/test/test_luhn.py
index 1c021a2..7014bb2 100644
--- a/test/test_luhn.py
+++ b/test/test_luhn.py
@@ -1,9 +1,9 @@
-from src.luhn import luhnСheck
+from src.luhn import luhn_check
 
 
 def test_good():
-    assert luhnСheck("8571 2612 1234 5467")
+    assert luhn_check("8571 2612 1234 5467")
 
 
 def test_bad():
-    assert not luhnСheck("4561 2612 1234 5463")
\ No newline at end of file
+    assert not luhn_check("4561 2612 1234 5463")
\ No newline at end of file

From 2c797573ff2288b46e40b33b7c08981824e12f44 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 14:00:30 +0300
Subject: [PATCH 05/17] Added .gitignore file

---
 .gitignore | 188 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 .gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1af57fa
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,188 @@
+# Created by https://www.toptal.com/developers/gitignore/api/venv,python
+# Edit at https://www.toptal.com/developers/gitignore?templates=venv,python
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+### venv ###
+# Virtualenv
+# http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
+[Bb]in
+[Ii]nclude
+[Ll]ib
+[Ll]ib64
+[Ll]ocal
+[Ss]cripts
+pyvenv.cfg
+pip-selfcheck.json
+
+# End of https://www.toptal.com/developers/gitignore/api/venv,python

From e7a4dfc2ec501e32dea6668c583d46ac9bfb5722 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 14:05:59 +0300
Subject: [PATCH 06/17] Added epsilon for floating numbers

---
 test/test_fast_pow.py | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/test/test_fast_pow.py b/test/test_fast_pow.py
index 06d0bf5..4a04a94 100644
--- a/test/test_fast_pow.py
+++ b/test/test_fast_pow.py
@@ -1,6 +1,5 @@
 from src.fast_pow import fast_pow
 
-
 def test_two_power_two():
     assert fast_pow(2, 2) == 4
 
@@ -10,12 +9,14 @@ def test_negative():
     assert fast_pow(-2, 3) == -8
 
 def test_negative_power():
-    assert fast_pow(5,-1) == 0.2
-    assert fast_pow(10, -2) == 0.01
-    assert fast_pow(77, -5) == 77**(-5)
+    epsilon = 1e-8
+
+    assert fast_pow(5,-1) - 0.2 <= epsilon
+    assert fast_pow(10, -2) - 0.01 <= epsilon
+    assert fast_pow(77, -5) - 77**(-5) <= epsilon
 
-    assert fast_pow(-0.2, -2) == 25
-    assert fast_pow(-0.2, -1) == 5
+    assert fast_pow(-0.2, -2) - 25 <= epsilon
+    assert fast_pow(-0.2, -1) - 5 <= epsilon
 
 def edge_cases():
     assert fast_pow(1100101, 0) == 1

From f38340a56705c6585d7b9cb96d3a2aec717a44ce Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 14:07:04 +0300
Subject: [PATCH 07/17] Formatted code with ruff

---
 src/fast_pow.py | 2 +-
 src/luhn.py     | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/fast_pow.py b/src/fast_pow.py
index 3fa87b0..730e720 100644
--- a/src/fast_pow.py
+++ b/src/fast_pow.py
@@ -1,2 +1,2 @@
 def fast_pow(number, power):
-    return number ** power
+    return number**power
diff --git a/src/luhn.py b/src/luhn.py
index e978d51..c5e85ca 100644
--- a/src/luhn.py
+++ b/src/luhn.py
@@ -1,7 +1,7 @@
-def luhn_check(cardNumber):
-    digits = [int(d) for d in str(cardNumber) if d.isdigit()]
+def luhn_check(card_number):
+    digits = [int(d) for d in str(card_number) if d.isdigit()]
     control = digits.pop()
-    parity = (len(digits))%2
+    parity = (len(digits)) % 2
     total = 0
     for i in range(len(digits)):
         if i % 2 == parity:

From ca5ad895bb6e6e16121df271ff78c57e66705846 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 14:09:55 +0300
Subject: [PATCH 08/17] Formatted code with ruff

---
 test/test_fast_pow.py | 7 +++++--
 test/test_luhn.py     | 2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/test/test_fast_pow.py b/test/test_fast_pow.py
index 4a04a94..be04b80 100644
--- a/test/test_fast_pow.py
+++ b/test/test_fast_pow.py
@@ -1,5 +1,6 @@
 from src.fast_pow import fast_pow
 
+
 def test_two_power_two():
     assert fast_pow(2, 2) == 4
 
@@ -8,16 +9,18 @@ def test_negative():
     assert fast_pow(-1, 4) == 1
     assert fast_pow(-2, 3) == -8
 
+
 def test_negative_power():
     epsilon = 1e-8
 
-    assert fast_pow(5,-1) - 0.2 <= epsilon
+    assert fast_pow(5, -1) - 0.2 <= epsilon
     assert fast_pow(10, -2) - 0.01 <= epsilon
-    assert fast_pow(77, -5) - 77**(-5) <= epsilon
+    assert fast_pow(77, -5) - 77 ** (-5) <= epsilon
 
     assert fast_pow(-0.2, -2) - 25 <= epsilon
     assert fast_pow(-0.2, -1) - 5 <= epsilon
 
+
 def edge_cases():
     assert fast_pow(1100101, 0) == 1
     assert fast_pow(-13, 0) == 1
diff --git a/test/test_luhn.py b/test/test_luhn.py
index 7014bb2..d042e3d 100644
--- a/test/test_luhn.py
+++ b/test/test_luhn.py
@@ -6,4 +6,4 @@ def test_good():
 
 
 def test_bad():
-    assert not luhn_check("4561 2612 1234 5463")
\ No newline at end of file
+    assert not luhn_check("4561 2612 1234 5463")

From 9009e4ecf9ec4e0aaae2dafff0242a41ae7661cf Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 14:14:56 +0300
Subject: [PATCH 09/17] Added tests for roots and added prefix 'test_' to
 edge_cases().

---
 test/test_fast_pow.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/test/test_fast_pow.py b/test/test_fast_pow.py
index be04b80..1477329 100644
--- a/test/test_fast_pow.py
+++ b/test/test_fast_pow.py
@@ -21,7 +21,13 @@ def test_negative_power():
     assert fast_pow(-0.2, -1) - 5 <= epsilon
 
 
-def edge_cases():
+def test_edge_cases():
     assert fast_pow(1100101, 0) == 1
     assert fast_pow(-13, 0) == 1
     assert fast_pow(111, 0) == 1
+
+
+def test_roots():
+    assert fast_pow(9, 0.5) == 3
+    assert fast_pow(8, 1 / 3) == 2
+    assert fast_pow(64, 1 / 6) == 2

From 7e57f322aae286017f7c7331e2693b357f9bf189 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 14:33:37 +0300
Subject: [PATCH 10/17] Fixed bugs in luhn_check()

card_number must be a string, added control number checking
---
 src/luhn.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/luhn.py b/src/luhn.py
index c5e85ca..a50004b 100644
--- a/src/luhn.py
+++ b/src/luhn.py
@@ -1,14 +1,15 @@
-def luhn_check(card_number):
-    digits = [int(d) for d in str(card_number) if d.isdigit()]
+def luhn_check(card_number: str):
+    digits = [int(d) for d in card_number if d.isdigit()]
     control = digits.pop()
     parity = (len(digits)) % 2
     total = 0
     for i in range(len(digits)):
-        if i % 2 == parity:
+        if (i + 1) % 2 == parity:
             doubled = digits[i] * 2
             if doubled > 9:
                 doubled -= 9
             total += doubled
         else:
             total += digits[i]
-    return (total + control) % 10 == 0
+    total += control
+    return total % 10 == 0 and total // 10 == control

From 351ba7472a2b307d9bcff4ea5ba46728d09bffe3 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 14:38:21 +0300
Subject: [PATCH 11/17] Fixed tests bugs

Changed testscase because it was invalid.
---
 test/test_luhn.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/test/test_luhn.py b/test/test_luhn.py
index d042e3d..5aad6cb 100644
--- a/test/test_luhn.py
+++ b/test/test_luhn.py
@@ -2,8 +2,11 @@
 
 
 def test_good():
-    assert luhn_check("8571 2612 1234 5467")
+    assert luhn_check("8571 2612 1234 5466")
+    assert luhn_check("4  5  6  1     2  6  1  2     1  2  3  4     5  5  6  6")
 
 
 def test_bad():
     assert not luhn_check("4561 2612 1234 5463")
+    assert not luhn_check("4  5  6  1     2  6  1  2     1  2  3  4     5  4  6  4")
+    assert not luhn_check("4  5  6  1     2  6  1  2     1  2  3  4     5  4  6  7")

From 8cbbbfbec090b9b1844107a353171b2ee4308825 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 14:51:46 +0300
Subject: [PATCH 12/17] Added interactive luhn card checking algorithm.

---
 src/luhn.py | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/luhn.py b/src/luhn.py
index a50004b..a5c2ddf 100644
--- a/src/luhn.py
+++ b/src/luhn.py
@@ -13,3 +13,32 @@ def luhn_check(card_number: str):
             total += digits[i]
     total += control
     return total % 10 == 0 and total // 10 == control
+
+
+def luhn_interactive():
+    def check_valid_card(card):
+        return all(x.isspace() or x.isdigit() for x in card)
+
+    while True:
+        try:
+            user_input = input("Write card number or -1 to quit: ")
+
+            if user_input == "-1":
+                break
+
+            if not check_valid_card(user_input):
+                raise Exception("You didn't enter a card.")
+
+            if luhn_check(user_input):
+                print("Your card is correct.")
+            else:
+                print("Your card is incorrect.")
+        except EOFError:
+            break
+        except Exception as e:
+            print(e)
+    print("Bye bye!")
+
+
+if __name__ == "__main__":
+    luhn_interactive()

From 1e998a50b6bab173767d01d8eb96b01b084eb34a Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 15:04:58 +0300
Subject: [PATCH 13/17] luhn_check() not raises ValueError

Added some tests for exception checking.
---
 src/luhn.py       | 24 +++++++++++++++++-------
 test/test_luhn.py | 11 +++++++++++
 2 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/src/luhn.py b/src/luhn.py
index a5c2ddf..7676dd4 100644
--- a/src/luhn.py
+++ b/src/luhn.py
@@ -1,4 +1,16 @@
 def luhn_check(card_number: str):
+    """
+    This is luhn checking algorithm.
+    It check whether the card is correct.
+    card_number must be a valid string containing digits and spaces.
+    It raises ValueError if card_number is invalid.
+    """
+    if (
+        not all(x.isspace() or x.isdigit() for x in card_number)
+        or len(card_number) == 0
+    ):
+        raise ValueError("The luhn algorithm did not receive a card for input.")
+
     digits = [int(d) for d in card_number if d.isdigit()]
     control = digits.pop()
     parity = (len(digits)) % 2
@@ -16,9 +28,10 @@ def luhn_check(card_number: str):
 
 
 def luhn_interactive():
-    def check_valid_card(card):
-        return all(x.isspace() or x.isdigit() for x in card)
-
+    """
+    This is command line interactive luhn checking algorithm.
+    User writes down a credit card and gets whether his card is correct or not.
+    """
     while True:
         try:
             user_input = input("Write card number or -1 to quit: ")
@@ -26,16 +39,13 @@ def check_valid_card(card):
             if user_input == "-1":
                 break
 
-            if not check_valid_card(user_input):
-                raise Exception("You didn't enter a card.")
-
             if luhn_check(user_input):
                 print("Your card is correct.")
             else:
                 print("Your card is incorrect.")
         except EOFError:
             break
-        except Exception as e:
+        except ValueError as e:
             print(e)
     print("Bye bye!")
 
diff --git a/test/test_luhn.py b/test/test_luhn.py
index 5aad6cb..d968638 100644
--- a/test/test_luhn.py
+++ b/test/test_luhn.py
@@ -1,3 +1,4 @@
+import pytest
 from src.luhn import luhn_check
 
 
@@ -10,3 +11,13 @@ def test_bad():
     assert not luhn_check("4561 2612 1234 5463")
     assert not luhn_check("4  5  6  1     2  6  1  2     1  2  3  4     5  4  6  4")
     assert not luhn_check("4  5  6  1     2  6  1  2     1  2  3  4     5  4  6  7")
+
+def test_invalid():
+    with pytest.raises(ValueError):
+        luhn_check("abc")
+
+    with pytest.raises(ValueError):
+        luhn_check("451abc")
+
+    with pytest.raises(ValueError):
+        luhn_check("")

From 01c7ae66cbdb9a24aa7b3c1c582061869455c3ea Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 15:06:03 +0300
Subject: [PATCH 14/17] Added comments for fast_pow()

---
 src/fast_pow.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/fast_pow.py b/src/fast_pow.py
index 730e720..a2b2a17 100644
--- a/src/fast_pow.py
+++ b/src/fast_pow.py
@@ -1,2 +1,5 @@
 def fast_pow(number, power):
+    '''
+    Mega fast pow algorithm.
+    '''
     return number**power

From b4675e66802decb84bfdad54557471848fc081af Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 15:06:03 +0300
Subject: [PATCH 15/17] Added comments for fast_pow()

---
 src/fast_pow.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/fast_pow.py b/src/fast_pow.py
index 730e720..a65f6bb 100644
--- a/src/fast_pow.py
+++ b/src/fast_pow.py
@@ -1,2 +1,5 @@
 def fast_pow(number, power):
+    """
+    Mega fast pow algorithm.
+    """
     return number**power

From 1f79e8d78a26a0c848af57c44cd5794c9f8d2353 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 15:10:01 +0300
Subject: [PATCH 16/17] Fixed previous stupid commit for not resolving
 conflicts.

---
 src/fast_pow.py | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/src/fast_pow.py b/src/fast_pow.py
index 74acb1f..a65f6bb 100644
--- a/src/fast_pow.py
+++ b/src/fast_pow.py
@@ -1,11 +1,5 @@
 def fast_pow(number, power):
-<<<<<<< HEAD
     """
     Mega fast pow algorithm.
     """
-=======
-    '''
-    Mega fast pow algorithm.
-    '''
->>>>>>> 01c7ae66cbdb9a24aa7b3c1c582061869455c3ea
     return number**power

From f33f4ca2679ddc51967352d05ed36732e3207566 Mon Sep 17 00:00:00 2001
From: Maxim Gavrilov <maksim.gavrilov.0@mail.ru>
Date: Thu, 23 Oct 2025 15:12:23 +0300
Subject: [PATCH 17/17] Fixed ruff checking issue.

---
 test/test_luhn.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/test_luhn.py b/test/test_luhn.py
index 89a1988..a891878 100644
--- a/test/test_luhn.py
+++ b/test/test_luhn.py
@@ -1,4 +1,5 @@
 import pytest
+
 from src.luhn import luhn_check