solves missing number in python

Author: anishLearnsToCode

README.md

@@ -81,7 +81,7 @@
 | 258 | [Add Digits](https://leetcode.com/problems/add-digits) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/AddDigits.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/add_digits.py) |
 | 263 | [Ugly Number](https://leetcode.com/problems/ugly-number) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/UglyNumber.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/ugly_number.py) |
 | 266 | 🔒 [Palindrome Permutation](https://leetcode.com/problems/palindrome-permutation) | Easy | |
-| 268 | [Missing Number](https://leetcode.com/problems/missing-number) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/MissingNumber.java) |
+| 268 | [Missing Number](https://leetcode.com/problems/missing-number) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/MissingNumber.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/missing_number.py) |
 | 270 | [Closest Binary Search Tree Value](https://leetcode.com/problems/closest-binary-search-tree-value) | Easy | |
 | 276 | [Paint Fence](https://leetcode.com/problems/paint-fence) | Easy | |
 | 278 | [First Bad Version](https://leetcode.com/problems/first-bad-version) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/FirstBadVersion.java) |

python/missing_number.py

@@ -0,0 +1,8 @@
+from typing import List
+
+
+class Solution:
+    def missingNumber(self, nums: List[int]) -> int:
+        n = len(nums)
+        acttual_sum = (n * (n + 1)) // 2
+        return acttual_sum - sum(nums)