LeetCode75——Day12

一、题目

11. Container With Most Water

You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]).

Find two lines that together with the x-axis form a container, such that the container contains the most water.

Return the maximum amount of water a container can store.

Notice that you may not slant the container.

Example 1:

Input: height = [1,8,6,2,5,4,8,3,7]
Output: 49
Explanation: The above vertical lines are represented by array [1,8,6,2,5,4,8,3,7]. In this case, the max area of water (blue section) the container can contain is 49.
Example 2:

Input: height = [1,1]
Output: 1

Constraints:

n == height.length
2 <= n <= 105
0 <= height[i] <= 104

二、题解

双指针+贪心

class Solution {
public:
    int maxArea(vector<int>& height) {
        int n = height.size();
        int left = 0,right = n - 1;
        int maxS = 0;
        while(left < right){
            int h1 = height[left];
            int h2 = height[right];
            int S = min(h1,h2) * (right - left);
            maxS = max(maxS,S);
            if(h1 > h2) right--;
            else left++;
        }
        return maxS;
    }
};