该题用到了.NET 3.5在System.Collections.Generic命名空间中包含一个新的集合类:HashSet<T>的Add()方法,详细信息请看转载:C# HashSet 用法. 题目: 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 t…

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:…

每天一算:Contains Duplicate II 描述 给出1个整形数组nums和1个整数k,是否存在索引i和j,使得nums[i] == nums[j] 且i和j之间的差不超过k Example 1: Input: nums = [1,2,3,1], k = 3 Output: true. Example 2: Input: nums = [1,0,1,1], k = 1 Output: true Example 3: Input: nums = [1,2,3,1,2,3], k = 2…

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. 题目标签:Array, Hash Table 题目给了我们一个nums array 和一个 k, 让…

Problem: 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 difference between i and j is at most k. Summary: 给出数组nums,整型数k,找到数组中是否存在nums[i]和nums[j]相等且…

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. 解题思路: HashMap,JAVA实现如下: public boolean containsNearby…

找出是否存在nums[i]==nums[j],使得 j - i <=k 这是map的一个应用 class Solution { public: bool containsNearbyDuplicate(vector<int>& nums, int k) { map<int,int> mii; ;i<nums.size() ;++i) { if (mii.find(nums[i]) != mii.end()) { if(i - mii[nums[i]] <=…

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 iand j is at most k. 方法1:暴力解法 代码如下: public class Solution { public boolean…

题目描述: 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 difference between i and j is at most k. 解题思路: HashMap解决. 代码如下: public class Solution { public…

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 difference between i and j is at most k. 问题:给定一个数组和整数 k ,判断是否存在两个相等元素,并且两个相等元素的下标差在 k 以内? 问题问是否存在一个子…

Question 219. Contains Duplicate II Solution 题目大意:数组中两个相同元素的坐标之差小于给定的k,返回true,否则返回false 思路:用一个map记录每个数的坐标,如果数相同,如果坐标差小于k则返回true否则覆盖,继续循环 Java实现: public boolean containsNearbyDuplicate(int[] nums, int k) { Map<Integer, Integer> map = new HashMap<&…

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…

题目: 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 difference between i and jis at most k. 给定一个整形数组和一个整数型数k,找出在这个数组中是否存在两个相同的数,并且这两个数的下标的距离小于k. "&q…

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 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 differen…

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 解题方法 使用set 使用字典 日期 题目地址:https://leetcode.com/problems/contains-duplicate-ii/description/ 题目描述 Given an array of integers and an integer k, find out whether there are two distinct in…

#-*- coding: UTF-8 -*-#遍历所有元素,将元素值当做键.元素下标当做值#存放在一个字典中.遍历的时候,#如果发现重复元素,则比较其下标的差值是否小于k,#如果小于则可直接返回True,否则更新字典中该键的值为新的下标class Solution(object):    def containsNearbyDuplicate(self, nums, k):        """        :type nums: List[int]        :typ…

题目: 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 difference between i and jis at most k. 提示: 此题考察的是对Hash Table的应用.这里给出两种方法,第一种基于unordered_map(Has…

---恢复内容开始--- Description 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 =…

375. 猜数字大小 II 原题链接375. 猜数字大小 II 题目下方给出了几个提示: 游戏的最佳策略是减少最大损失,这引出了 Minimax 算法,见这里,和这里 使用较小的数开始(例如3),看看在最差的情况下你要支付多少钱? 即使 n 比较小,完全使用递归的效率也很低,试试动态规划吧. 我们就按照上面的提示玩一把:猜数字大小 II. 当 n = 3,那么我们有 3 个选择:1 或 2 或 3. 假设我们先猜 1,就有两种情况: [猜对]:1 就是正确的数字,所以你支付 0¥,或者 [猜错]…

题目: 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 difference between i and jis at most k. 链接: http://leetcode.com/problems/contains-duplicate-ii/…

给定一个整数数组和一个整数 k,判断数组中是否存在两个不同的索引 i 和 j,使 nums [i] = nums [j],并且 i 和 j 的绝对差值最大为 k. 详见:https://leetcode.com/problems/contains-duplicate-ii/description/ Java实现: class Solution { public boolean containsNearbyDuplicate(int[] nums, int k) { int n=nums.leng…

要求 给出整型数组nums和整数k,是否存在索引i和j,nums[i]==nums[j],且i和j之间的差不超过k 思路 暴力解法(n2) 建立最长为k+1的滑动窗口,用set查找窗口中是否有重复元素,若没有则向后滑动(时间n,空间k) 并不存在滑动窗口的实体,通过维护set中的元素实现 代入具体例子确定边界 1 class Solution { 2 public: 3 bool containsNearbyDuplicate(vector<int>& nums, int k) { 4…

题目: 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 difference between i and j is at most k. 思路: 给定一个数组a,和一个整数k,题意是判断一个数组里面,有没有重复的两个元素,坐标是i和j,且i和j只差…

Given an array of integers, every element appears three times except for one, which appears exactly once. Find that single one. 题意: 在一个整型数组里,只有一个数字出现一次,其他数字都出现了3次,求这个只出现一次的数字(single number). 这真是非常非常有意思的一道题目.如果直接统计各数字出现的次数当然也能达到目的,不过空间复杂度为O(N).能否用O(1)…

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 iand j is at most k. 哈希表的使用 class Solution { public: bool containsNearbyDup…

题目: 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 difference between i and j is at most k. 翻译: 给定一个整数数组和一个整数k.找出是否存在下标i,j使得nums[i] = nums[j].同一时候i…

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…

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…

 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…

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…