← 返回 apple 的题目列表Longest Mountain in Array
类型：qbank
You may recall that an array arr is a mountain array if and only if:.
Examples
Example 1:
Input: arr = [2,1,4,7,3,2,5]
Output: 5
Explanation:
The largest mountain is [1,4,7,3,2] with length 5.
Example 2:
Input: arr = [2,2,2]
Output: 0
Explanation:
No mountain — there must be strictly increasing then strictly decreasing sides of length >= 1 each.
Constraints
1 <= arr.length <= 10^4
0 <= arr[i] <= 10^4