941. Valid Mountain Array
Easy
10 Points
Array
Given an array of integers arr, return true if and only if it is a valid mountain array.
Recall that arr is a mountain array if and only if:
Examples
Example 1
Input: arr = [2,1]
Output: false
Example 2
Input: arr = [3,5,5]
Output: false
Example 3
Input: arr = [0,3,2,1]
Output: true
Constraints
1 <= arr.length <= 1040 <= arr[i] <= 104
941. Valid Mountain Array
Easy
10 Points
Array
Given an array of integers arr, return true if and only if it is a valid mountain array.
Recall that arr is a mountain array if and only if:
Examples
Example 1
Input: arr = [2,1]
Output: false
Example 2
Input: arr = [3,5,5]
Output: false
Example 3
Input: arr = [0,3,2,1]
Output: true
Constraints
1 <= arr.length <= 1040 <= arr[i] <= 104