Given an array of integers, the majority number is the number that occurs more than half of the size of the array. Find it. Notice You may assume that the array is non-empty and the majority number always exist in the array. Have you met this questio…

Majority Number Given an array of integers, the majority number is the number that occurs more than half of the size of the array. Find it. Example Given [1, 1, 1, 1, 2, 2, 2], return 1 分析: 既然这里只有一个majority number,那么它的个数减去其它number个数之和还是为正值. public cl…

Given an array of integers and a number k, the majority number is the number that occurs more than 1/k of the size of the array. Find it. Have you met this question in a real interview? Yes Example Given [3,1,2,3,2,3,3,4,4,4] and k=3, return 3. Note…

Given an array of integers, the majority number is the number that occurs more than 1/3 of the size of the array. Find it. Note There is only one majority number in the array Example For [1, 2, 1, 2, 1, 3, 3] return 1 Challenge O(n) time and O(1) spa…

给定一组数,有一个数在这组数里的出现次数超过n/2次. 求出这是哪个数 https://leetcode.com/problems/majority-element/ 一开始考虑的方是将所有数转化为二进制,那么对于这些二进制数来说. 其每一位上必然是出现次数最多的数决定了它是1还是0. 例如,将每个二进制数的最低位加起来,得到一个sum. 那么如果sum/nums.length大于0.5那么这个majority number在最低位必然是1 反之必然为0.这样就可以把所有的位置求出来.AC了 但…

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…

Given an array of integers, the majority number is the number that occurs more than 1/3 of the size of the array. Find it. Have you met this question in a real interview? Yes Example Given [1, 2, 1, 2, 1, 3, 3], return 1. Note There is only one major…

Given an array of integers, the majority number is the number that occurs more than half of the size of the array. Find it. Notice You may assume that the array is non-empty and the majority number always exist in the array. Have you met this questio…

Majority Number II 原题链接: http://lintcode.com/en/problem/majority-number-ii/# Given an array of integers, the majority number is the number that occurs more than 1/3 of the size of the array. Find it. Note There is only one majority number in the arra…