Container With Most Water

题目

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.

解题思路

面积只看边界的两条线，和中间的线没关系。两个指针i,j分别指向头和尾，如果头小，i++，否则j++。

代码

public class Solution {  public int maxArea(int[] height){int i=0;int j=height.length-1;int max=0;while(j>i){int tmp=height[i]<=height[j]?height[i]:height[j];if(tmp*(j-i)>max)max=tmp*(j-i);if(height[i]<=height[j])++i;else--j;}return max;}}

运行结果