The One-Way Street

A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

easy

Seniority

L3

Problem

Given a list of numbers, return True if the sequence is monotonic (entirely non-decreasing OR entirely non-increasing). Equal consecutive values are allowed. An empty or single-element list returns True.

Summary

Monotonic time-series. Direction only.

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