LeetCode 268 - Missing Number Problem

Problem Statement

Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array.

Example 1:
Input: [3,0,1]
Output: 2
Example 2:
Input: [9,6,4,2,3,5,7,0,1]
Output: 8
Note: Your algorithm should run in linear runtime complexity. Could you implement it using only constant extra space complexity?

Solution:

class Solution: def missingNumber(self, nums: List[int]) -> int: if not nums: return nums result = len(nums) for i in range(len(nums)): result ^= i^nums[i] return result