solves find all numbers tha disappeared in array

Author: anishLearnsToCode

Diff for: README.md

@@ -119,7 +119,7 @@
 | 441 | [Arranging Coins](https://leetcode.com/problems/arranging-coins) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/ArrangingCoins.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/arranging_coins.py) |
 | 443 | [String Compression](https://leetcode.com/problems/string-compression) | Medium | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/StringCompression.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/string_compression.py) |
 | 447 | [Number of Boomerangs](https://leetcode.com/problems/number-of-boomerangs) | Medium | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/NumberOfBoomerangs.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/number_of_boomerangs.py) |
-| 448 | [Find All Numbers Disappeared in an Array](https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/FindAllNumbersDisappearedInAnArray.java) |
+| 448 | [Find All Numbers Disappeared in an Array](https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/FindAllNumbersDisappearedInAnArray.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/find_all_numbers_disappeared_in_an_array.py) |
 | 453 | [Minimum Moves to Equal Array Elements](https://leetcode.com/problems/minimum-moves-to-equal-array-elements) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/MinimumMovesToEqualArrayElements.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/minimum_moves_to_equal_array_element.py) |
 | 455 | [Assign Cookies](https://leetcode.com/problems/assign-cookies) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/AssignCookies.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/assign_cookies.py)|
 | 459 | [Repeated Substring Pattern](https://leetcode.com/problems/repeated-substring-pattern) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/RepeatedSubstringPattern.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/repeated_substring_pattern.py) |

Diff for: python/find_all_numbers_disappeared_in_an_array.py

@@ -0,0 +1,11 @@
+from typing import List
+
+
+class Solution:
+    def findDisappearedNumbers(self, nums: List[int]) -> List[int]:
+        numbers = set(nums)
+        result = []
+        for number in range(1, len(nums) + 1):
+            if number not in numbers:
+                result.append(number)
+        return result