Monotonic Array

Easy

An array is monotonic if it is entirely non-increasing or entirely non-decreasing. Given nums, return true if it is monotonic.

Example 1

Input:  nums = [1,2,2,3]
Output: true

Example 2

Input:  nums = [6,5,4,4]
Output: true

Example 3

Input:  nums = [1,3,2]
Output: false

Constraints

• 1 <= nums.length <= 10^5
• -10^5 <= nums[i] <= 10^5