lc162-Find Peak Element

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