[LeetCode]Find Median from Data Stream Find Median from Data Stream Median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value. So the median is the mean of the two middle value. Examples: [2,3,4], the median is3 [2,3], ...
题目地址:https://leetcode.com/problems/sliding-window-median/ 题目描述 Median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value. So the median is the mean of the two middle value. Examples: [2,3,4], the median is3 [2,3]...
[2,3], the median is(2 + 3) / 2 = 2.5 Design a data structure that supports the following two operations: void addNum(int num) - Add a integer number from the data stream to the data structure. double findMedian() - Return the median of all elements so far. For example: add(1...
这题是实现几个接口,保证接口可以找出数据流的中位数,bf肯定是可以做,但是更好的解法就是使用两个堆或者优先队列,只要找出两个堆的根元素,也就是小根堆的堆顶和大根堆的堆顶元素,两数之和的一半就是中位数。还可以使用bst来做,两个左右指针,来确定中位数。 代码: java: 代码语言:javascript 代码运行次数:0...
如果leftNum < k,我们只需要从右子树中找第k - leftNum - 1个数。 代码的话,我们首先定义一个二分查找树。和普通的二分查找树不同的地方在于,节点多了一个成员变量,记录以当前节点为根节点的二叉树的总节点数量。 此外实现了find函数,来返回有序情况下第k个节点的值。 classBST{...
leetcode two heap use two heap is quite straight forward. importjava.util.Comparator;importjava.util.PriorityQueue;publicclassMedianFinder{PriorityQueue<Integer>left;PriorityQueue<Integer>right;MedianFinder(){left=newPriorityQueue<>(10,newComparator<Integer>(){@Overridepublicintcompare(Integero1,Integero2)...
There are two sorted arrays A and B of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)). 1publicclassSolution {2publicdoublefindMedianSortedArrays(intA[],intB[]) {3intalen =A.length;4intblen =B.length;5if...