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.
\n\nNotes:
\n\n\n
Example 1:
\n\n\nInput: mountain = [2,4,4]\nOutput: []\nExplanation: mountain[0] and mountain[2] can not be a peak because they are first and last elements of the array.\nmountain[1] also can not be a peak because it is not strictly greater than mountain[2].\nSo the answer is [].\n\n\n
Example 2:
\n\n\nInput: mountain = [1,4,3,8,5]\nOutput: [1,3]\nExplanation: mountain[0] and mountain[4] can not be a peak because they are first and last elements of the array.\nmountain[2] also can not be a peak because it is not strictly greater than mountain[3] and mountain[1].\nBut mountain [1] and mountain[3] are strictly greater than their neighboring elements.\nSo the answer is [1,3].\n\n\n
\n
Constraints:
\n\n3 <= mountain.length <= 1001 <= mountain[i] <= 100给你一个下标从 0 开始的数组 mountain 。你的任务是找出数组 mountain 中的所有 峰值。
以数组形式返回给定数组中 峰值 的下标，顺序不限 。
\n\n注意：
\n\n\n\n
示例 1：
\n\n\n输入：mountain = [2,4,4]\n输出：[]\n解释：mountain[0] 和 mountain[2] 不可能是峰值，因为它们是数组的第一个和最后一个元素。\nmountain[1] 也不可能是峰值，因为它不严格大于 mountain[2] 。\n因此，答案为 [] 。\n\n\n
示例 2：
\n\n\n输入：mountain = [1,4,3,8,5]\n输出：[1,3]\n解释：mountain[0] 和 mountain[4] 不可能是峰值，因为它们是数组的第一个和最后一个元素。\nmountain[2] 也不可能是峰值，因为它不严格大于 mountain[3] 和 mountain[1] 。\n但是 mountain[1] 和 mountain[3] 严格大于它们的相邻元素。\n因此，答案是 [1,3] 。\n\n\n
\n\n
提示：
\n\n3 <= mountain.length <= 1001 <= mountain[i] <= 100nums[i] > num[i - 1] and nums[i] > nums[i + 1] nums[i] is a peak."
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