class Solution {
public:
    /**
     * 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vector 
     * @return int整型
     */
    int findPeakElement(vector<int>& nums) {
        // write code here
        int left = 0 ;
        int right = nums.size()-1;
        while(left<right){
            int mid = (left + right)/2;
            if(nums[mid]>nums[mid+1]){
                right=mid;
            }
            else{
                left=mid+1;
            }
        }
        //  left / right
        return left;
    }
};