162

class Solution {
public:
    int findPeakElement(vector<int>& nums) {
        int l=0, r=nums.size()-1;
        while(l<r){
            int mid = (l+r)/2;
            if(nums[mid] > nums[mid+1])
                r = mid;
            else
                l = mid+1;
        }
        return l;
    }
};