leetcode--217. 存在重复元素 题目描述:给定一个整数数组,判断是否存在重复元素. 如果存在一值在数组中出现至少两次,函数返回 true .如果数组中每个元素都不相同,则返回 false . 示例 1: 输入: [1,2,3,1] 输出: true 示例 2: 输入: [1,2,3,4] 输出: false /** * 思路:将参数中的数组循环遍历,一一添加到一个 HashSet 对象中,HashSet会过滤重复元素, * 只需要拿数组nums与添加了全部数组元素的set比较,大小不…

217. 存在重复元素 给定一个整数数组,判断是否存在重复元素. 如果存在一值在数组中出现至少两次,函数返回 true .如果数组中每个元素都不相同,则返回 false . 示例 1: 输入: [1,2,3,1] 输出: true 示例 2: 输入: [1,2,3,4] 输出: false 示例 3: 输入: [1,1,1,3,3,4,3,2,4,2] 输出: true 通过次数428,800 提交次数772,142 一道很常见的基础题,作为熟悉LeetCode的开始,重点放在熟悉其对于算法的表…

217. Contains Duplicate Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 题意:判断数组中是否有重复的元…

217. Contains Duplicate Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 思路:若整型数组中存在出现超过…

Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 题目标签:Array, Hash Table 题目给了我们一个nums arr…

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…

lc 217 Contains Duplicate 217 Contains Duplicate Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is…

ji那天好像是周六.....吃完饭意识到貌似今天要有比赛(有题解当然要做啦),跑回寝室发现周日才开始233333 ====================================================================== leetcode217 Contains Duplicate leetcode219 Contains Duplicate II leetcode228 Summary Ranges ==============================…

Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. Example 1: Input: [1,2,3,1] Output: tru…

217. 存在重复元素 给定一个整数数组,判断是否存在重复元素. 如果任何值在数组中出现至少两次,函数返回 true.如果数组中每个元素都不相同,则返回 false. 示例 1: 输入: [1,2,3,1] 输出: true 示例 2: 输入: [1,2,3,4] 输出: false 示例 3: 输入: [1,1,1,3,3,4,3,2,4,2] 输出: true class Solution { public boolean containsDuplicate(int[] nums) { Se…

Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 解题思路: HashMap,JAVA实现如下: public boolean…

Problem: Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. Summary: 判断数组中是否出现重复值. Analysi…

Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 代码如下: public class Solution { public bo…

题目描述: Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 解题思路: 这种重复的问题首先想到的就是Set了. 代码如下: p…

 Contains Duplicate Total Accepted: 26477 Total Submissions: 73478 My Submissions Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it shoul…

题目要求 Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 题目分析及思路 给出一个整数数组,判断这个数组是否包含重复值.若有任…

[题目1] Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 判断是否存在重复数字 [思路] 1.想复杂了,用了HashSet/…

给定一个整数数组,判断是否存在重复元素. 如果任何值在数组中出现至少两次,函数返回 true.如果数组中每个元素都不相同,则返回 false. 示例 1: 输入: [1,2,3,1] 输出: true 示例 2: 输入: [1,2,3,4] 输出: false 示例 3: 输入: [1,1,1,3,3,4,3,2,4,2] 输出: true 思路: 如果一个数组中有重复元素,那么去重后的长度肯定不会等于原来的长度,这是显然的,既然python提供了set和len那么直接用就好了_(:з」∠)_…

Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. Example 1: Input: [1,2,3,1] Output: tru…

 Contains Duplicate Total Accepted: 26477 Total Submissions: 73478 My Submissions Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it shoul…

题目: 给定一个整数数组,判断是否存在重复元素. Given an array of integers, find if the array contains any duplicates. 如果任何值在数组中出现至少两次,函数返回 true.如果数组中每个元素都不相同,则返回 false. Your function should return true if any value appears at least twice in the array, and it should return…

给定一个整数数组,判断是否存在重复元素. 如果任何值在数组中出现至少两次,函数返回 true.如果数组中每个元素都不相同,则返回 false. 示例 1: 输入: [1,2,3,1]输出: true示例 2: 输入: [1,2,3,4]输出: false示例 3: 输入: [1,1,1,3,3,4,3,2,4,2]输出: true class Solution: def containsDuplicate(self, nums: List[int]) -> bool: hashmap = {}…

Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the absolute difference between i and j is at most k. Example 1: Input: nums = [1,2,3,1], k = 3 Output:…

Given an array of integers, find out whether there are two distinct indices i and j in the array such that the absolute difference between nums[i] and nums[j] is at most t and the absolute difference between i and j is at most k. Example 1: Input: nu…

大家好,我是编程熊. 往期文章介绍了<线性表>中的数组.链表.栈.队列,以及单调栈和滑动窗口. ACM金牌选手讲解LeetCode算法<线性表> ACM金牌选手讲解LeetCode算法<栈和队列的高级应用> 本期我们学习哈希,其主要作用是加速我们查找数据的速度. 文章将从以下几个方面展开,内容通俗易懂. 若不想了解哈希原理,直接使用哈希表刷题的话,可以直接下拉到"常见的哈希结构"部分. 哈希概述 哈希表又称散列表,表现形式为将任意长度的输入,通过哈希…

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LeetCode:存在重复元素[217] 题目描述 给定一个整数数组,判断是否存在重复元素. 如果任何值在数组中出现至少两次,函数返回 true.如果数组中每个元素都不相同,则返回 false. 示例 1: 输入: [1,2,3,1] 输出: true 示例 2: 输入: [1,2,3,4] 输出: false 示例 3: 输入: [1,1,1,3,3,4,3,2,4,2] 输出: true 题目分析 对于数据结构HashSet, 我们首先需要知道的是HashSet是不包含重复元素的,其次是存储…

题目描述 217. 存在重复元素 给定一个整数数组,判断是否存在重复元素. 如果任何值在数组中出现至少两次,函数返回 true.如果数组中每个元素都不相同,则返回 false. 示例 1: 输入: [1,2,3,1]输出: true 示例 2: 输入: [1,2,3,4]输出: false 示例 3: 输入: [1,1,1,3,3,4,3,2,4,2]输出: true 来源:力扣(LeetCode)链接:https://leetcode-cn.com/problems/contains-dupl…

Leetcode第 217 场周赛 比赛链接:点这里 做完前两题我就知道今天的竞赛我已经结束了 这场比赛思维量还是比较大的. 1673. 找出最具竞争力的子序列 题目 给你一个整数数组 nums 和一个正整数 k ,返回长度为 k 且最具 竞争力 的 nums 子序列. 数组的子序列是从数组中删除一些元素(可能不删除元素)得到的序列. 在子序列 a 和子序列 b 第一个不相同的位置上,如果 a 中的数字小于 b 中对应的数字,那么我们称子序列 a 比子序列 b(相同长度下)更具 竞争力 . 例如…

题目 Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. Subscribe to see which companies ask…