题解 | #寻找峰值# 二分查找

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
        int left = 0;
        int right = nums.length - 1;
        while (left < right) {
            int mid = left + (right - left) / 2;
            if (mid - 1 >= 0 && nums[mid - 1] > nums[mid]) {
                right = mid - 1;
            } else if (mid + 1 < nums.length && nums[mid + 1] > nums[mid]){
                left = mid + 1;
            } else {
                return mid;
            }
        }
        return left;
    }
}