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Leetcode 11. Container With Most Water(盛最多水的容器)

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LeetCode 11. Container With Most Water

题目描述

https://leetcode-cn.com/problems/container-with-most-water/

解法1

暴力+剪枝

光暴力是超时的,再加上一些条件限制勉强可以通过。

int left = 0;
int right = height.length - 1;
int maxLeft = height[left];
int maxRight = height[right];
for (int i = left; i < right; i++) {
   if (height[i] < maxLeft) {
       continue;
  }
   for (int j = right; j > left; j--) {
       if (height[j] < maxRight)
           continue;
       int curHeight = height[i] > height[j] ? height[j] : height[i];
       int curArea = (j - i) * curHeight;
       if (curArea > max) {
           max = curArea;
           maxLeft = height[i];
           maxRight = height[j];
      }
  }
}

解法2

双指针

其实可以暴力中的左右指针一起移动。将复杂度从O(n^2) 降到 O(n)

Area(i, j) = min(height[i], height[j])×(i - j)

代码如下:

int i = 0;
int j = height.length - 1;
int res = 0;
while (i < j) {
   int bottom = j - i;
   if (height[i] < height[j]) {
       res = Math.max(res, bottom * height[i++]);
  } else {
       res = Math.max(res, bottom * height[j--]);
  }
}
return res;

 

标签:11,right,Container,int,res,height,Water,max,left
来源: https://www.cnblogs.com/miao123-blog/p/15789260.html