bool isMonotonic(nums) returns true if the array nums is monotonic, and false otherwise.

An array is monotonic if it is either monotone increasing or monotone decreasing.

An array is monotone increasing if for every i such that 0 <= i < nums.length - 1, nums[i] <= nums[i + 1].

An array is monotone decreasing if for every i such that 0 <= i < nums.length - 1, nums[i] >= nums[i + 1].

Note: An array with one element is monotonic.

Constraints:

• $1 \leq$ nums.length $\leq 10^5$

• $-10^5 \leq$ nums[i] $\leq 10^5$

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.