11. 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 and n is at least 2.

思路

维护两个下标i=0,j=height.size()-1,从数组两侧遍历，求面积的最大值，然后判断i,j对应的数值大小，height[i]

代码

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