Please explain me the problem in this code

#1

import java.util.*;
public class Main
{
public static class Node
{
int data;
Node next;
}
public static class LinkedList
{
private Node head;
private Node tail;
private int size;
public void addLast(int item)
{
Node nn=new Node();
nn.data=item;

		if(size>0)
			tail.next=nn;
		if(size==0)
			head=tail=nn;
		else
			tail=tail.next;
			
		size++;
	}
}

public static void main(String[] args) 
{
	Scanner sc=new Scanner (System.in);
	int t=sc.nextInt();
	while(t!=0)
	{
	    LinkedList list1=new LinkedList();
        LinkedList list2=new LinkedList();
	    int size1=sc.nextInt();
	    for(int i=0;i<size1;i++)
	    {
	        list1.addLast(sc.nextInt());
	    }
	    int size2=sc.nextInt();
	    for(int i=0;i<size2;i++)
	    {
	        list2.addLast(sc.nextInt());
	    }
	    
	    Node l1=list1.head;
	    Node l2=list2.head;
	    
	    while(l1!=null && l2!=null)
	    {
	        if(l1.data<=l2.data)
	        {
	            System.out.print(l1.data+" ");
	            l1=l1.next;
	        }
	        else
	        {
	            System.out.print(l2.data+" ");
	            l2=l2.next;
	        }
	    }
	    
	    if(l1!=null)
	    {
	        while(l1!=null)
	        {
	            System.out.print(l1.data+" ");
	            l1=l1.next;
	        }
	    }
	    else if(l2!=null)
	    {
	        while(l2!=null)
	        {
	            System.out.print(l2.data+" ");
	            l2=l2.next;
	        }
	    }
	    t--;
	}
}

}

#2

@tishachhabra2702_8fc5a68a2e295e35 Very slight change is required. You need to print answer of every iteration in a new line. So add a System.out.println(); at the end of body of the while loop.(Just before t–;)Corrected Code :
import java.util.*;
public class Main
{
public static class Node
{
int data;
Node next;
}
public static class LinkedList
{
private Node head;
private Node tail;
private int size;
public void addLast(int item)
{
Node nn=new Node();
nn.data=item;

		if(size>0)
			tail.next=nn;
		if(size==0)
			head=tail=nn;
		else
			tail=tail.next;
			
		size++;
	}
}

public static void main(String[] args) 
{
	Scanner sc=new Scanner (System.in);
	int t=sc.nextInt();
	while(t!=0)
	{
	    LinkedList list1=new LinkedList();
        LinkedList list2=new LinkedList();
	    int size1=sc.nextInt();
	    for(int i=0;i<size1;i++)
	    {
	        list1.addLast(sc.nextInt());
	    }
	    int size2=sc.nextInt();
	    for(int i=0;i<size2;i++)
	    {
	        list2.addLast(sc.nextInt());
	    }
	    
	    Node l1=list1.head;
	    Node l2=list2.head;
	    
	    while(l1!=null && l2!=null)
	    {
	        if(l1.data<=l2.data)
	        {
	            System.out.print(l1.data+" ");
	            l1=l1.next;
	        }
	        else
	        {
	            System.out.print(l2.data+" ");
	            l2=l2.next;
	        }
	    }
	    
	    if(l1!=null)
	    {
	        while(l1!=null)
	        {
	            System.out.print(l1.data+" ");
	            l1=l1.next;
	        }
	    }
	    else if(l2!=null)
	    {
	        while(l2!=null)
	        {
	            System.out.print(l2.data+" ");
	            l2=l2.next;
	        }
	    }
	    t--;
//added this line
System.out.println();
	}
}

}

1 Like
#3

Thanks, it worked well!!

#4

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