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932. Monotonic Array

Array

Problem - Monotonic Array

Easy

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

An array nums is monotone increasing if for all i <= j, nums[i] <= nums[j]. An array nums is monotone decreasing if for all i <= j, nums[i] >= nums[j].

Given an integer array nums, return true if the given array is monotonic, or false otherwise.

 

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 <= 105
  • -105 <= nums[i] <= 105

Solutions

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class Solution:
    def isMonotonic(self, nums: List[int]) -> bool:
        inc = all(val1 <= val2 for val1, val2 in pairwise(nums))
        dec = all(val1 >= val2 for val1, val2 in pairwise(nums))
        return inc or dec

Submission Stats:

  • Runtime: 23 ms (76.69%)
  • Memory: 28.9 MB (68.92%)