Given an array of integers and an integer k, find out whether there there are two distinct indices i and j in the array such that nums[i] = nums[j] and the difference between i and j is at most k. 直接使用循环时间复杂度为O(N*k),使用stl中的基于红黑树实现的map能降低循环的时间,在O(logN…

Contains Duplicate II Given an array of integers and an integer k, find out whether there there are two distinct indices i and j in the array such that nums[i] = nums[j] and the difference between i and j is at most k. Have you met this question in a…

一.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. 分析:先把数组排个序,然后遍历排序后…

 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. Solution 1: s…

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. 判断数组是是否含有重复元素.…

 1. Contains Duplicate 题目链接 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. 代码如下:…

原文题目: 217. Contains Duplicate 219. Contains Duplicate II 读题: 217只要找出是否有重复值, 219找出重复值,且要判断两者索引之差是否小于k //217. Contains Duplicate 46ms class Solution { public: bool containsDuplicate(vector<int>& nums) { set <int> s; //vector <int>::ite…

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. class Solution { pub…

219. Contains Duplicate II[easy] 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. 错误解法: class Solut…

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. 解题思路 用一个set保存数组中的值,假…