Programmer Group

Sword finger offer array topic summary (C + + version)   1. Duplicate number in array All numbers in an array num of length n are in the range of 0 ~ n-1. Some numbers in the array are repeated, but I don't know how many numbers are repeated, or how many times each number is repeated. Find any duplicate number in the array. Idea 1: sort first ...

1 PrefaceProgramming problem: input an integer n and output the nth item of Fibonacci sequenceSome interviewers like to ask this question. Maybe you think it's too simple. It can be realized at once by recursion or recursion.Just when you are full of confidence and realize it in two waysInterviewer: now please optimize your recursive implementa ...

Today, I'd like to share with you the interview process of a friend who went to today's headlines (a junior undergraduate student who is currently interning in meituan). The following is his journey, which is divided into six links: If you want to climb the peak, don't use the rainbow as a ladder. 1. Self introduction After a brief ...

Title: give two one-dimensional int arrays a and B. where: A is an ordered array with length m and elements in good order from small to large. B is an ordered array with length n and elements arranged from small to large. We hope to find the maximum k numbers from the A and B arrays. It is required to use as few comparisons as possible. Soluti ...

The Birth of Cat Food Company Gyroscope is a program. It started its own company. In order to commemorate the years when dream was born, the company named "Running Yard" and its main business is cat food production. A Miao that takes R&D and operations into account is not a long-term solution. So I hired a vegetable mew to be an ...

1, Jingdong interview questions 1. Implementation principle of @ Autowired 1. Injection method:         1. Constructor based dependency injection public class UserServiceImpl implents UserService{ private UserDao userDao; @Autowire public UserServiceImpl(UserDao userDao){ this.userDao = ...

1 what is JUC 1.1 introduction to JUC In Java, the thread part is a key point. The JUC mentioned in this article is also about threads. JUC is short for Java. Util. Concurrent toolkit. This is a toolkit for processing threads. JDK 1.5 began to appear. 1.2 processes and threads Process is a running activity of a computer program on a data s ...

catalogue 1, Please design a class that can only create objects on the heap 2, Designing a class can only create objects on the stack 3, Design a class that cannot be copied 4, Designing a class cannot be inherited 5, When designing a class, only one object can be instantiated         five point one   The singlet ...

1, What is a distributed lock? We all know the concept of lock when learning Java, such as synchronized lock based on JVM implementation and a set of code level locking mechanism lock provided by jdk. We often use these two locks in concurrent programming to ensure the correctness of code running in multi-threaded environment. However, these l ...

There's nothing to say. Everyone here is beautiful List array Vector vector Stack stack Map mapping dictionary Set set Queue queue Deque bidirectional queue Pay attention to the official account and exchange with each other. Search by WeChat: Sneak ahead. General method of general queue Operation method Throw exception Blocking thread Re ...