665. Non-decreasing Array LeetCode Solution | Easy Approach

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Non-decreasing Array Given an array nums with n integers, your task is to check if it could become non-decreasing by modifying at most one element.

We define an array is non-decreasing if nums[i] <= nums[i + 1] holds for every i (0-based) such that (0 <= i <= n - 2).

Example 1:

Input: nums = [4,2,3]
Output: true
Explanation: You could modify the first 4 to 1 to get a non-decreasing array.

Example 2:

Input: nums = [4,2,1]
Output: false
Explanation: You can't get a non-decreasing array by modify at most one element.

Constraints:

  • n == nums.length
  • 1 <= n <= 104
  • -105 <= nums[i] <= 105

Non-decreasing Array Solutions

Time: O(n)
Space: O(n)

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