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[leetcode]Container With Most Water

时间:2015-08-06 11:03:16      阅读:167      评论:0      收藏:0      [点我收藏+]

题目:

Given n non-negative integers a1a2, ..., an, where each represents a point at coordinate (iai). n vertical lines are drawn such that the two endpoints of line i is at (iai) 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.

解答:

1、穷举法,两重循环,时间复杂度O(n^2),提交会出现超时错误;

2、两指针中间靠,是一种贪心策略,因为中间靠的过程中,线间隔变小,所以只有如下情况才有可能取更大值:板的高度变的更高。

代码如下:

public int maxArea(int[] height) {
        int max = 0;
        int left = 0;
        int right = height.length - 1;
        int curArea = 0;
        while (left < right) {
            curArea = (right - left) * (height[right] < height[left] ? height[right--] : height[left++]);
            if (curArea > max)
                max = curArea;
        }
        return max;
    }

 

[leetcode]Container With Most Water

原文:http://www.cnblogs.com/shizhh/p/4707280.html

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