First Unique Number In Stream 描述: Given a continuous stream of numbers, write a function that returns the first unique number whenever terminating number is reached(include terminating number). If there no unique number before terminating number or y…

前几天工作需要用LoadRunner进行压力测试,期间对手机号进行参数化设置. 当时选用了<Value>137{Random_quhao}{Unique_weiyi}</Value>模式,Random Number.Unque Number参数类型选择如下: Parameter type Random Number Unique Number Number(Block size per) 9999 9999 Sample 0001 0001 Number %04lu %04d Up…

转自:http://blog.csdn.net/dreamer2020/article/details/52049629 问题来源 业务中有时会遇到要生成不重复随机数的情况,例如,新生成一个商品编号.房间编号.或者其他物品编号等.不愿意采用表的自增索引 id,同时又希望新生成的编号是不重复的. 这就需要考验mysql的随机数功能了. Solution mysql的rand函数可以生成一个0到1之间的随机数,进行一定的放大即可得到一个随机数.再通过条件查询来限制新随机数没有在表中出现过.如下所示:…

题目如下: Given an array of integers arr, write a function that returns true if and only if the number of occurrences of each value in the array is unique. Example 1: Input: arr = [1,2,2,1,1,3] Output: true Explanation: The value 1 has 3 occurrences, 2 h…

Find the kth smallest number in at row and column sorted matrix. Have you met this question in a real interview? Yes Example Given k = 4 and a matrix: [ [1 ,5 ,7], [3 ,7 ,8], [4 ,8 ,9], ] return 5 Challenge O(k log n), n is the maximal number in widt…

Given two arrays of length m and n with digits 0-9 representing two numbers. Create the maximum number of length k <= m + n from digits of the two. The relative order of the digits from the same array must be preserved. Return an array of the k digit…

Write a program to find the nth super ugly number. Super ugly numbers are positive numbers whose all prime factors are in the given prime list primes of size k. For example, [1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32] is the sequence of the first 12…

Given an integer array (index from 0 to n-1, where n is the size of this array), and an query list. Each query has two integers [start, end]. For each query, calculate the minimum number between index start and end in the given array, return the resu…

Find the kth smallest number in at row and column sorted matrix. Example Given k = 4 and a matrix: [ [1 ,5 ,7], [3 ,7 ,8], [4 ,8 ,9], ] return 5 Challenge KLog(Min(M,N,K))时间复杂度 K是因为要Poll K次并且同时insert K次,Min(M,N,K)是堆的size,insert的时间是Log(MIN(M,N,K)) 思路就…

Ugly number is a number that only have factors 3, 5 and 7. Design an algorithm to find the kth number such that the only prime factors are 3, 5, and 7. The eligible numbers are like 3, 5, 7, 9, 15 ... Example If k=4, return 9. Challenge O(n log n) or…

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 桶排序 日期 题目地址:https://leetcode-cn.com/problems/check-if-a-number-is-majority-element-in-a-sorted-array/ 题目描述 Given an array of integers A`, return the largest integer that only oc…

Besides heap, multiset<int> can also be used: class Solution { void removeOnly1(multiset<int> &ms, int v) { auto pr = ms.equal_range(v); ms.erase(pr.first); } void remove(multiset<int> &lmax, multiset<int> &rmin, int v)…

题目: 判断字符串是否没有重复字符 实现一个算法确定字符串中的字符是否均唯一出现 样例 给出"abc",返回 true 给出"aab",返回 false 挑战 如果不使用额外的存储空间,你的算法该如何改变? 解题: 定义一个集合最简单. Java程序: public class Solution { /** * @param str: a string * @return: a boolean */ public boolean isUnique(String st…

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这是小川的第次更新,第篇原创 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第269题(顺位题号是1207).给定一个整数数组arr,当且仅当该数组中每个元素的出现次数唯一时,返回true. 例如: 输入:arr = [1,2,2,1,1,3] 输出:true 说明:值1出现3次,值2出现2次,值3出现1次.没有两个值出现的次数相同. 输入:arr = [1,2] 输出:false 输入:arr = [-3,0,1,-3,1,1,1,-3,10,0] 输出:true 限制条件:…

题意: 给出一个数字x,让你找出一个由1到9这九个数字组成的数字,这个数字的每一位加起来等于x,并且1到9每个数字只能出现一次.若能找到这样的数字,输出这其中最小的一个,否则输出-1. 思路: 利用二进制枚举,枚举每个1到9这九个数字是否出现.每次枚举若和等于x,则将被选中的数字从小到大排列,取得到的数字中最小的一个.若全部枚举完之后并没有找到符合要求的数字,则不存在这样的数字.由于枚举9个数字是否出现,所以最坏情况是\(2^9\),也就是\(1e3\)的复杂度,必然不会超时. AC代码: #i…

什么是栈(Stack)? 栈(stack)是一种采用后进先出(LIFO,last in first out)策略的抽象数据结构.比如物流装车,后装的货物先卸,先转的货物后卸.栈在数据结构中的地位很重要,在算法中的应用也很多,比如用于非递归的遍历二叉树,计算逆波兰表达式,等等. 栈一般用一个存储结构(常用数组,偶见链表),存储元素.并用一个指针记录栈顶位置.栈底位置则是指栈中元素数量为0时的栈顶位置,也即栈开始的位置.栈的主要操作: push(),将新的元素压入栈顶,同时栈顶上升. pop(),将…

AX2012的number sequence framework中引入了两个Scope和segment两个概念,它们的具体作用从下面序列的例子说起. 法国/中国的法律要求财务凭证的Journal number包含公司代码和财务期间,比如这样的号码J-20-Jan11-000340,J表上Journal,20代表的是公司代码,Jan11为财务期间,000340才是系统生成的流水号. 在创建Numer sequence的界面上可以选择需要的Scope: Company and fiscal cale…

LintCode 83. Single Number II (Medium) LeetCode 137. Single Number II (Medium) 以下算法的复杂度都是: 时间复杂度: O(n) 空间复杂度: O(1) 解法1. 32个计数器 最简单的思路是用32个计数器, 满3复位0. class Solution { public: int singleNumberII(vector<int> &A) { int cnt[32] = {0}; int res = 0; f…

Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1, 104]. The first one who bets on a unique number wins. For example, if there are 7…

Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1, 104]. The first one who bets on a unique number wins. For example, if there are 7…

题目链接:http://pat.zju.edu.cn/contests/pat-a-practise/1041 题目描述: Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1, 104]. The first one…

1041. Be Unique (20) 时间限制 100 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen fr…

1041 Be Unique (20 分) Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1,10​4​​]. The first one who bets on a unique number wins. For…

Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1, 104]. The first one who bets on a unique number wins. For example, if there are 7…

1041 Be Unique (20 分) Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1,10​4​​]. The first one who bets on a unique number wins. For…

1041. Be Unique (20) 时间限制 100 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen fr…

https://pintia.cn/problem-sets/994805342720868352/problems/994805444361437184 Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1, 10^4…

1041 Be Unique (20 分) Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1,10​4​​]. The first one who bets on a unique number wins. For…

1041. Be Unique (20) 时间限制 100 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen fr…