LeetCode--container-with-most-water

题目描述

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.

分析：双指针向中间靠拢

class Solution {
public:
    int maxArea(vector<int> &height) {
        int s,maxArea = 0;
        int l=0,r=height.size()-1;
        while(l<r){
            s = (r-l)*min(height[l],height[r]);
            if(s > maxArea)
                maxArea = s;
            if(height[l]>height[r])
                r--;
            else
                l++;
        }
        return maxArea;
    }
};