Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. Example 1: Input: [3,2,3] Ou…

Given an integer array of size n, find all elements that appear more than ⌊ n/3 ⌋ times. Note: The algorithm should run in linear time and in O(1) space. Example 1: Input: [3,2,3] Output: [3] Example 2: Input: [1,1,1,3,3,2,2,2] Output: [1,2] 169. Maj…

题外话 最近有些网友来信问我博客怎么不更新了,是不是不刷题了,真是惭愧啊,题还是在刷的,不过刷题的频率没以前高了,看完<算法导论>后感觉网上很多讨论的题目其实在导论中都已经有非常好的算法以及数学证明,只是照搬的话好像意义也不是很大,希望找到些有代表性的题目在更新,另外希望能接着前面的<穷举递归和回溯算法终结篇>一系列如动态规划.贪心算法类的终结篇,在梳理自己知识结构的同时也能够帮助读者们更系统的学习算法思想.好了话不多说,进入正题. 问题描述 给定一个数组A[n], 定义数组的主元…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 求主元素:包括n个元素的数组中.假设一个元素的出现次数大…

2018-09-23 13:25:40 主元素问题是一个非常经典的问题,一般来说,主元素问题指的是数组中元素个数大于一半的数字,显然这个问题可以通过遍历计数解决,时间复杂度为O(n),空间复杂度为O(n).这样的算法有两个弊端,一是空间复杂度较高,二是没法处理数据流问题. 因此就有了Boyer-Moore Majority Vote algorithm,这个算法可以用来高效的解决主元素问题,并且空间复杂度降到了O(1),时间复杂度保持不变. 算法的思路就是将不同的元素进行抵消,最后剩余的就是最终…

Given an integer array of size n, find all elements that appear more than ⌊ n/3 ⌋ times. The algorithm should run in linear time and in O(1) space. 求主元素,这次的是大于sz/3就算是主元素,可以分为两轮查找,第一轮先查找元素数目较多的两个元素(可能不属于主元素),第二次再遍历来查找上面两个元素是否符合条件,代码如下: class Solution…

题目 主元素 III 给定一个整型数组,找到主元素,它在数组中的出现次数严格大于数组元素个数的1/k. 样例 ,返回 3 注意 数组中只有唯一的主元素 挑战 要求时间复杂度为O(n),空间复杂度为O(k) 解题 上一题刚介绍过所用的方法,但是这个确实很复杂的 先利用HashMap实现 public class Solution { /** * @param nums: A list of integers * @param k: As described * @return: The major…

题目 主元素II 给定一个整型数组,找到主元素,它在数组中的出现次数严格大于数组元素个数的三分之一. 样例 给出数组[1,2,1,2,1,3,3] 返回 1 注意 数组中只有唯一的主元素 挑战 要求时间复杂度为O(n),空间复杂度为O(1). 解题 利用HashMap,key值是元素值,value是出现次数,但是时间复杂度和空间复杂度都是O(N) public class Solution { /** * @param nums: A list of integers * @return: Th…

题目地址: https://oj.leetcode.com/problems/majority-element/ 题目内容: Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 这里题目要求找出出现次数超过n/2的元素. 可以先排序,…

Given an array of size n, find the majority element. The majority element is the element that appears more than  n/2  times. You may assume that the array is non-empty and the majority element always exist in the array. Hide Tags: Divide and Conquer…

［抄题］: Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. [暴力解法]: 时间分析: 空间分析: ［奇…

描述:Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 思路1:Moore voting algorith…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. Credits:Special thanks to @t…

Majority Element I 描述 给定一个整型数组,找出主元素,它在数组中的出现次数严格大于数组元素个数的二分之一. You may assume that the array is non-empty and the majority number always exist in the array. 样例 给出数组[1,1,1,1,2,2,2],返回 1 挑战 要求时间复杂度为O(n),空间复杂度为O(1) class Solution: """ @param:…

1 题目描述 Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 2 分析 求主元素有两种O(n)量级的算法…

一. 题目描写叙述 Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 二. 题目分析 题目说到,给定一个数…

这周刚开始讲了一点Divide-and-Conquer的算法,于是这周的作业就选择在LeetCode上找分治法相关的题目来做. 169.Majority Element Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-e…

LeetCode169. Majority Element Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. (Easy) You may assume that the array is non-empty and the majority element always exist in th…

Given an integer array of size n, find all elements that appear more than ⌊ n/3 ⌋ times. The algorithm should run in linear time and in O(1) space. Hint: How many majority elements could it possibly have? Do you have a better hint? Suggest it! 这道题让我们…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 给定一个数组,求其中权制最大的元素,(该元素出现超过了一…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 这一题可以用排序之后查看序列正中间那个元素的方法来解.但…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 解题思路: 编程之美P130(寻找发帖水王)原题,如果删…

#Method 1import math class Solution(object):    def majorityElement(self, nums):        numsDic={}        for num in nums:            numsDic[num]=numsDic[nums]+1 if num in numsDic else 0            if numsDic[num]>len(nums)/2:                return…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. Solution 1: 使用map计数 class So…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 思路: 找到一个数组中出现次数超过一半的数.排序.哈希等…

题目链接:majority-element /** * Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array.…

Total Accepted: 95925 Total Submissions: 239241 Difficulty: Easy Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majorit…

题目: Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. Credits:Special thanks t…

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 个人博客:http://www.cnblogs.com/…