[leetcode]Container With Most Water

Container With Most Water

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.

题目描述：坐标轴n条与x轴垂直的线，求出由两条线围成的桶的最大面积。

算法思路：短板效应

１.　暴力法：求出所有两条线的组合情况，继而求出最大面积。

2．  二分法：维护一个最大面积，先算出首尾两条线组成的面积；然后让短板向中间走（因为长板向中间走只会让面积更小，只有更新短板才可能更新最大面积）

public class Solution {
    public int maxArea(int[] height) {
        if(height == null || height.length < 2) return 0;
        int area = 0;
        int begin = 0, end = height.length - 1,max = 0;
        while(begin < end){
            int shortBar = Math.min(height[begin],height[end]);
            area = shortBar * (end - begin);
            if(area > max) {
                max = area;
            }
            if(height[begin] == shortBar){
                begin++;
            }else{
                end--;
            }
        }
        return max;
    }
}

参考：

http://blog.csdn.net/wzy_1988/article/details/17248209

http://www.cnblogs.com/zhaolizhen/p/Containerwater.html