import java.util.*; public class Solution { /** * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 * * * @param nums int整型一维数组 * @return int整型 */ public int findPeakElement (int[] nums) { // write code here if (nums == null || nums.length < 1) { return -1; } int n = nums.length; int l = 0; int r = n - 1; while (l < r) { int mid = l + (r - l) / 2; if (nums[mid] > nums[mid + 1]) { r = mid; } else { l = mid + 1; } } return r; } }