题目
注意：二维接雨水，有墙的，有线的，着这个属于线的。

class Solution {public int maxArea(int[] height) {if (height.length < 2) {return 0;}int left = 0, right = height.length - 1, res = 0;while (left < right) {int tmp = (right - left) * Math.min(height[left], height[right]);res = Math.max(res, tmp);if (height[left] <= height[right]) {++left;} else {--right;}}return res;}
}