class Solution {
public:
    int maxArea(vector<int>& height) {
        int res = 0;
        for (int i=0, j= height.size()-1; i <j;){
            res = max(res, min(height[i], height[j]) * (j - i));
            if (height[i] > height[j]) j--;
            else i++;
        }
        return res;
    }
};