两个有序的数组 nums1 和 nums2 维数分别为m,n.找所有数的中位数,复杂度 O(log (m+n)) 注意:奇偶个数,分治法求解,递归出口特殊处理.取Kth smallest数时,分治取mid=k/2和k-mid,避免奇数造成影响. class Solution { double findKth(vector<int> num1,vector<int> num2, int k) { int m = num1.size(), n = num2.size(); if(m &…

一道非常经典的题目,Median of Two Sorted Arrays.(PS:leetcode 我已经做了 190 道,欢迎围观全部题解 https://github.com/hanzichi/leetcode) 题意非常简单,给定两个有序的数组,求中位数,难度系数给的是 Hard,希望的复杂度是 log 级别.回顾下中位数,对于一个有序数组,如果数组长度是奇数,那么中位数就是中间那个值,如果长度是偶数,就是中间两个数的平均数. O(nlogn) 最容易想到的解法是 O(nlogn) 的解…

LeetCode(3) || Median of Two Sorted Arrays 题记 之前做了3题,感觉难度一般,没想到突然来了这道比较难的,星期六花了一天的时间才做完,可见以前基础太差了. 题目内容 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…

题目来源:https://leetcode.com/problems/median-of-two-sorted-arrays/ There are two sorted arrays nums1 and nums2 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)). 解题思路: 题目是这样的:给…

Median of Two Sorted Arrays 搜索时间复杂度的时候,看到归并排序比较适合这个题目.中位数直接取即可,所以重点是排序. 再来看看治阶段,我们需要将两个已经有序的子序列合并成一个有序序列 by 图解排序算法(四)之归并排序 第1次提交 class Solution: def findMedianSortedArrays(self, nums1, nums2): """ :type nums1: List[int] :type nums2: List[in…

4. Median of Two Sorted Arrays 题目链接:https://leetcode.com/problems/median-of-two-sorted-arrays/ Description: There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time compl…

4. Median of Two Sorted Arrays 给定两个有序的整数序列.求中位数,要求复杂度为对数级别. 通常的思路,我们二分搜索中位数,对某个序列里的某个数 我们可以在对数时间内通过二分算法求得两个序列中比它小的数,整体复杂度也是对数级别.但是代码实现较为困难. 换一个思路,我们把中位数不要当作一个数,而当作一个序列的划分.划分后,序列的左半部设为L,右半部设为R 满足max(L)<=min(R)且满足len(L)==len(R) 二分搜索这个划分即可.对于A+B的长度为奇数的情…

4. Median of Two Sorted Arrays Hard There are two sorted arrays nums1 and nums2 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)). You may assume nums1 and nums2 cannot be b…

题目描述:Median of Two Sorted Arrays 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)). 分析: 题目中的数组A和数组B都是排好序的,首先想到的算法是:设置一个计数器m,指针pA指向数组A的首地址…

题目简述: 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)). 解题思路: 这本身是个很简单的题目,但是题目要求他的复杂度为O(log(m+n)),就很有难度了.不过首先我们还是可以明确我们要用分治法.关键是怎么分治呢?我们…