leetcode-217存在重复元素 题意 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 算法 用时:24ms 复杂度:<= O(n) 升序排序,遍历数组,如果存在元素与后一元素值相等,结束返回true…

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. 查找一个数组中是否含有重复元素,可以利用哈希实现 代码: class S…

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…

public class Solution { public bool ContainsDuplicate(int[] nums) { var list = nums.Distinct(); if (list.Count() == nums.Length) { return false; } else { return true; } } } https://leetcode.com/problems/contains-duplicate/#/description…

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 ==============================…