Skip to main content

Delete Nth node from the end of the given linked list Solution - java

 Delete Nth node from the end of the given linked list Solution .

For Explanation Watch Video :






Code::

class Solution {
    public ListNode removeNthFromEnd(ListNode head, int n) {
        int count = 0;//5
        ListNode temp1 = head;
        while(temp1!=null){
            count++;
            temp1 = temp1.next;
        }
        if(count==n){
            return head.next;
        }
        ListNode temp2 = head;
        int remove = count - n;//3
        int count1 = 0;
        while(count1!=remove-1){
            temp2 = temp2.next;
            count1++;
        }
        temp2.next = temp2.next.next;
        return head;
    }
}

Comments

Popular posts from this blog

Servlet Project Book Shop Application in eclipse

 Servlet Project Book Shop Application in eclipse  For explanation watch video::: Note :: In this Project you must configure web server (for example tomcat) with eclipse ide Download Bootstrap  from ::         https://getbootstrap.com/docs/4.3/getting-started/download/ Download mysql jar file from :: https://mvnrepository.com/artifact/mysql/mysql-connector-java/8.0.22 adding MySQL Connector/J jar file in eclipse ide for jdbc video :: video link : https://youtu.be/4Fyd-k3eG_I Directory Structure:: web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">   <welcome-file-list>     <welcome-file>home.html</welcome-file>   </welcome-file-list>   <display-...

JDBC basic example For Select Query

JDBC basic example For Select Query  For explanation watch video:  For Creating Table:: SQL> create table emp60(srno int,fname varchar2(10)); Table created. SQL> desc emp60;  Name                                      Null?    Type  ----------------------------------------- -------- ----------------------------  SRNO                                               NUMBER(38)  FNAME                                              VARCHAR2(10) SQL> insert into emp60 values(1,'allu'); 1 row created. SQL> insert into emp60 values(2,'vijay'); 1 row created. SQL> insert into emp60 values(3,'rajni'); 1 row created. SQL...

The PADS Hackerrank Solution - SQL

  The PADS Hackerrank Solution - SQL For Explanation Watch Video :  Oracle::  SELECT  NAME || '(' || SUBSTR(OCCUPATION,1,1) || ')' AS N FROM OCCUPATIONS ORDER BY N; SELECT 'There are a total of ' || COUNT(OCCUPATION) || ' ' || LOWER(OCCUPATION) || 's.' FROM OCCUPATIONS GROUP BY OCCUPATION ORDER BY COUNT(OCCUPATION), OCCUPATION; MySql: ======= SELECT CONCAT(NAME,'(',SUBSTR(OCCUPATION,1,1),')') AS NA FROM OCCUPATIONS ORDER BY NA; SELECT CONCAT('There are a total of ',COUNT(OCCUPATION),' ',LOWER(OCCUPATION),'s.') FROM OCCUPATIONS GROUP BY OCCUPATION ORDER BY COUNT(OCCUPATION), OCCUPATION;