448. Find All Numbers Disappeared in an Array LeetCode Solution

Find All Numbers Disappeared in an Array Given an array nums of n integers where nums[i] is in the range [1, n], return an array of all the integers in the range [1, n] that do not appear in nums.

Example 1:

Input: nums = [4,3,2,7,8,2,3,1]
Output: [5,6]

Example 2:

Input: nums = [1,1]
Output: [2]

Constraints:

• n == nums.length
• 1 <= n <= 105
• 1 <= nums[i] <= n

Find All Numbers Disappeared in an Array Solutions

✅Time: O(n)
✅Space: O(n)

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