Back to course home
0% completed
Solution: Valid Mountain Array
Problem Statement
Given an integer array arr
, return true
if arr
is a valid mountain
array. Otherwise, return false
.
The array is called a valid mountain array
if:
arr.length > 2
- There exists some
i
with0 < i < arr.length - 1
such that:arr[0] < arr[1] < ... < arr[i - 1] < arr[i]
arr[i] > arr[i + 1] > ... > arr[arr.length - 1]
Examples
Example 1:
- Input: arr =
[4, 5, 6, 7, 8, 7, 6, 5]
- Expected Output:
true
- Justification: The elements increase from
4
to8
and then decrease from8
back to `5
.....
.....
.....
Like the course? Get enrolled and start learning!
Table of Contents
Contents are not accessible
Contents are not accessible
Contents are not accessible
Contents are not accessible
Contents are not accessible