How should I practice Monotonic Array?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Bloomberg LP phone screen problems in FastPrep.

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FastPrep tags this as a Bloomberg LP phone screen coding practice problem when the problem catalog has that company and stage context.

Monotonic Array

Bloomberg LP● EasyNEW GRADPHONE SCREEN

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Problem statement

Return whether nums is monotone. It is monotone when it is entirely nondecreasing or entirely nonincreasing.

Function

isMonotonic(nums: int[]) → boolean

Examples

Example 1

nums = [1,2,2,3]return = true

The array is nondecreasing.

Example 2

nums = [1,3,2]return = false

The direction changes.

Constraints

1 <= nums.length <= 10^5.
Values are 32-bit signed integers.