Content 有一个长度为 \(n\) 的数组 \(a_1,a_2,a_3,...,a_n\),试找出一个数 \(d\),使得数组中的每个数除以 \(d\) 得到的 \(n\) 个结果中至少有 \(\dfrac{n}{2}\) 个正数,输出任意一个 \(d\) 均可,或者没有这样的 \(d\). 数据范围:\(1\leqslant n\leqslant 100,-10^3\leqslant a_i\leqslant 10^3\). Solution 先统计一下这里面有多少个正数和多少个负数.如…

原题链接在这里:https://leetcode.com/problems/find-duplicate-file-in-system/description/ 题目: Given a list of directory info including directory path, and all the files with contents in this directory, you need to find out all the groups of duplicate files in…

原题链接在这里:https://leetcode.com/problems/reshape-the-matrix/#/description 题目: In MATLAB, there is a very useful function called 'reshape', which can reshape a matrix into a new one with different size but keep its original data. You're given a matrix re…

Given an unsorted integer array, find the first missing positive integer. For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant space. 分析: 因为数组的大小为n,因此那个缺失的整数只可能的范围[1,n+1] 方法一:需要O(n)的空间,设…

题目来源 https://leetcode.com/problems/first-missing-positive/ Given an unsorted integer array, find the first missing positive integer. For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant…

41. First Missing Positive Given an unsorted integer array, find the first missing positive integer. For example, Given [1,2,0] return 3, and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant space. My Thought 题目大意 给定一个数组,…

Given an unsorted integer array, find the first missing positive integer. For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant space. 给出一组数,找到里面缺少的第一个正数. 让o(n)时间,而且是o(1)空间. 一开始想的是记录正数的个数…

1.问题描述 2.题解思路 本题的思路是对于数组中每个正的元素,应该将其放到数组中对应的位置,比如元素1 ,应该放在数组的第一个位置.以此类推,最后检查数组中元素值和下标不匹配的情况. 3.代码 int firstMissingPositive(vector<int>& nums) { ) ; ; i < nums.size() ; i++) { && nums[i] < nums.size() && nums[i] != nums[ num…

Given an unsorted integer array, find the first missing positive integer. For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant space. 题意: 给定一个无序的序列,找到其中首次缺少的正数. 题目好抽象!!!lz表示这个题意看了老久才看明白!…

A.Relic Discovery_hdu5982 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 57    Accepted Submission(s): 49 Problem Description Recently, paleoanthropologists have found historical remains on an…