Find the Peaks
You are given a 0-indexed array mountain. Your task is to find all the peaks in the mountain array.
Return an array that consists of indices of peaks in the given array in any order.
Notes:
- A peak is defined as an element that is strictly greater than its neighboring elements.
- The first and last elements of the array are not a peak.
Example 1
Input
mountain = [2,4,4]Output
[]The first and last elements cannot be peaks, and
mountain[1] is not strictly greater than mountain[2], so there are no peaks.Example 2
Input
mountain = [1,4,3,8,5]Output
[1,3]The first and last elements cannot be peaks, while
mountain[1] and mountain[3] are strictly greater than their neighboring elements.Constraints
- 3 <= mountain.length <= 100
- 1 <= mountain[i] <= 100