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?
Your algorithm should run in linear runtime complexity. Could you implement it using only constant extra space complexity?
class Solution: def missingNumber(self, nums: List[int]) -> int: missing = len(nums) for i in range(0,len(nums)): missing ^= i ^ nums[i] return missing Time Complexity : O(n) Space Complexity : O(1) Note : Here array starts with 0 not 1 so n = len(nums)
if it starts with 1 like natural numbers then n = len(nums)+1
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