[LeetCode] Container With Most Water 简要分析

前言

这题非要说贪心的话也算是吧，不过最主要的特征还是双指针。LC的题好像不少都是扔倆头尾指针然后遍历一遍完事儿的。这道题倒是“短板效应”的不错体现了。

题目

题目链接

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.

思路

图片看不清楚的话可右键复制链接转到图床再看。

代码

class Solution {
public:
    int maxArea(vector<int>& height) {
        int first = 0;
        int end = height.size() - 1;
        int result = INT_MIN;
        while (first < end) 
        {
            int width = end - first;
            int board = height[end]<height[first]?height[end]:height[first];
            int area = board*width;
            result = result>area?result:area;
            if (height[first] <= height[end]) 
                first++;
            else
                end--;
        }
        return result;
        }
};

 

其他

JAVA果然过得比CPP快，Python和C#依旧垫底。