Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) runtime?…

problem 448. Find All Numbers Disappeared in an Array solution: class Solution { public: vector<int> findDisappearedNumbers(vector<int>& nums) { vector<int> res; ; i<nums.size(); i++) { ; nums[tmp] = nums[tmp]> ? -nums[tmp] : n…

后面3个题都是限制在1-n的,所有可以不先排序,可以利用巧方法做.最后两个题几乎一模一样. 217. Contains Duplicate class Solution { public: bool containsDuplicate(vector<int>& nums) { int length = nums.size(); ) return false; sort(nums.begin(),nums.end()); ;i < length;i++){ ]) return tr…

题目: 448. Find All Numbers Disappeared in an Array Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could…

448. Find All Numbers Disappeared in an Array[easy] Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Coul…

Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) runtime?…

题目链接: https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/description/ 题目描述: Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] incl…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 方法一:暴力求解 方法二:原地变负做标记 方法三:使用set 日期 [LeetCode] 题目地址:https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/ Total Accepted: 14302 Total Submissions: 24993 Difficulty:…

Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) runtime?…

Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) runtime?…

题目要求 Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) run…

My first reaction is to have an unlimited length of bit-array, to mark existence. But if no extra mem is allowed, we can simply use 'sign' on each index slot to mark the same info.. it is a common technique. class Solution { public: vector<int> find…

Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) runtime?…

A self-dividing number is a number that is divisible by every digit it contains. For example, 128 is a self-dividing number because 128 % 1 == 0, 128 % 2 == 0, and 128 % 8 == 0. Also, a self-dividing number is not allowed to contain the digit zero. G…

题目: Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) runt…

题目 给定一个范围在 1 ≤ a[i] ≤ n ( n = 数组大小 ) 的 整型数组,数组中的元素一些出现了两次,另一些只出现一次. 找到所有在 [1, n] 范围之间没有出现在数组中的数字. 您能在不使用额外空间且时间复杂度为O(n)的情况下完成这个任务吗? 你可以假定返回的数组不算在额外空间内. 示例: 输入: [4,3,2,7,8,2,3,1] 输出: [5,6] 题解 时间:O(n) 空间:O(1)(可以优化,不用 tem 的交换两个元素的值) class Solution { pub…

Description Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O…

题目描述 给定n个数字的数组,里面的值都是1-n,但是有的出现了两遍,因此有的没有出现,求没有出现值这个数组中的值有哪些. 要求不能用额外的空间(除了返回列表之外),时间复杂度n 思路 因为不能用额外空间并且时间是O(n),所以不能用排序或者hash 通过在对应位置的值去确定下一个位置,一直到遍历完.其实自己也没有很成熟的思想. 比如对于[4,3,2,7,8,2,3,1]: A[0],4=>找到a[3],7=>a[6],3=>a[2]====注意有可能出现循环,行不通. 本来以为行不通,…

https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/ 给出一列数,1 ≤ a[i] ≤ n,n是数组大小,有些数出现两次,有些数出现一次,找出在[1,n]中但是不在数列中的数. 不用额外的空间,时间复杂度O(n) Example: Input: [4,3,2,7,8,2,3,1] Output: [5,6] 解题思路:一开始想的很简单1.把原数组去重2.构造一个[1,n]的数组,然后求个差集就行了既然都是用…

给定一个范围在  1 ≤ a[i] ≤ n ( n = 数组大小 ) 的 整型数组,数组中的元素一些出现了两次,另一些只出现一次.找到所有在 [1, n] 范围之间没有出现在数组中的数字.您能在不使用额外空间且时间复杂度为O(n)的情况下完成这个任务吗? 你可以假定返回的数组不算在额外空间内.示例:输入:[4,3,2,7,8,2,3,1]输出:[5,6]详见:https://leetcode.com/problems/find-all-numbers-disappeared-in-an-arra…

题目描述 题目分析 有个[1,n]的条件要充分利用起来. 题目代码 public class Solution { public List<Integer> findDisappearedNumbers(int[] nums) { List<Integer> list=new ArrayList<Integer>(); if(nums==null || nums.length==0) return list; if(nums.length == 1 ){ list.ad…

［抄题］: Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) ru…

Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could you do it without extra space and in O(n) runtime?…

448. Find All Numbers Disappeared in an Array Easy Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this array. Could…

LeetCode--Find All Numbers Disappeared in an Array Question Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this arr…

问题来源:Find All Numbers Disappeared in an Array 很久没有刷题了,感觉大脑开始迟钝,所以决定重拾刷题的乐趣.一开始不要太难,选一些通过率高的题目做,然后就看到了这个题目.我有些吃惊,这个题我虽然知道两种解法,但本身还是有难度的,居然通过率这么高.然后就搜索相关网页,看到一个和它很接近的题目<Find All Duplicates in an Array>,然后就释然了.这两个题目有相同的题干,只是问题略微不同,解法有相似之处.估计是因为题号太接近了,会…

Given an integer array, find three numbers whose product is maximum and output the maximum product. Example 1: Input: [1,2,3] Output: 6 Example 2: Input: [1,2,3,4] Output: 24 Note: The length of the given array will be in range [3,104] and all elemen…

原题链接在这里:https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/ 题目: Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that d…

这是悦乐书的第232次更新,第245篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第99题(顺位题号是448).给定一个整数数组,其中1≤a[i]≤n(n =数组的大小),一些元素出现两次,其他元素出现一次.找到[1,n]包含的所有元素,这些元素不会出现在此数组中.你可以在没有额外空间和O(n)运行时的情况下完成吗? 您可以假设返回的列表不计入额外空间.例如: 输入:[4,3,2,7,8,2,3,1] 输出:[5,6] 本次解题使用的开发工具是eclipse,jdk…

Problem Description: Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given…