## [data structure Java version] play with linked list interview questions and personal question solutions

1. Delete all nodes in the linked list equal to the given value val
OJ link
class Solution {
public ListNode removeElements(ListNode head, int val) {
if(head==null){
return null;
}
ListNode prev=head;
ListNode cur=head.next;
while(cur!=null){
if(cur.val==val){
...

Posted by **ofaltins** on *Sun, 05 Sep 2021 07:01:49 +0200*

## OJ online programming common input and output

A The input includes two positive integers a, B (1 < = a, B < = 10 ^ 9), and the input data includes multiple groups. Output Description: Output the result of a+b Example 1 input 1 5 10 20 output 6 30
import java.util.Scanner;
public class Main1 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
...

Posted by **shdt** on *Sat, 04 Sep 2021 20:54:48 +0200*

## Sequential queue, cyclic queue, chain queue

preface
Queue is a "first in, first out" linear table. Only one end of the table is inserted (queued), which is called the end of the queue, and the other end is deleted (queued), which is called the opposite end, that is, "tail in, head out". Only the head and tail of the queue can be accessed by the outside world, s ...

Posted by **pacholo** on *Sat, 04 Sep 2021 04:38:24 +0200*

## Basic data structure - stack (implemented in c language)

Basic data structure - stack
Stack is a last in, first out linear table. It is the most basic data structure and has applications in many places.
What is stack
Stack is a linear table that restricts insertion and deletion to only one location. Among them, the end that allows insertion and deletion is located at the end of the table, which is ...

Posted by **jodyanne** on *Fri, 03 Sep 2021 04:15:14 +0200*

## java implementation of a simple binary tree, job hopping byte jump

2, Binary tree
1. Definition of binary tree
A binary tree is a tree structure in which each node has at most two subtrees. It has five basic forms: binary tree can be an empty set; The root can have an empty left subtree or right subtree; Or the left and right subtrees are empty.
2. Properties of binary tree
Property 1: the maximum number ...

Posted by **mashamit** on *Thu, 02 Sep 2021 22:32:54 +0200*

## Data structure stack

1. DS stack - output in reverse order (used by STL stack)
Title Description
C + + has its own stack object stack, so there is no need to write the specific implementation code of stack operation.
This topic mainly helps you to be familiar with the use of stack object, and then realize the reverse order output of string
Enter a string, p ...

Posted by **leoo24** on *Thu, 02 Sep 2021 19:13:04 +0200*