738. Monotone Increasing Digits LeetCode Solution | Easy Approach

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Monotone Increasing Digits An integer has monotone increasing digits if and only if each pair of adjacent digits x and y satisfy x <= y.

Given an integer n, return the largest number that is less than or equal to n with monotone increasing digits.

Example 1:

Input: n = 10
Output: 9

Example 2:

Input: n = 1234
Output: 1234

Example 3:

Input: n = 332
Output: 299

Constraints:

  • 0 <= n <= 109

Monotone Increasing Digits Solutions

Time: O(n)
Space: O(n)

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