Container With Most Water

leetcode 11

Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find two lines, which together with x-axis forms a container, such that the container contains the most water.

Note: You may not slant the container and n is at least 2.
思路：题目要求是x轴上在1,，2...n点上有许多垂直的线段，长度依次是a1，a2...an.找出两条线段，使他们和x轴围成的面积最大。
弄两个指针l和r，从头尾开始，如果height[l]

var maxArea = function(height) {
    var l=0;
    var r=height.length-1;
    var res=Math.min(height[l],height[r])*(r-l);
    while(l