Simple Java LinkedList comparison problems

Question

I was trying LinkedLists on java on a online platform. It cleared 7 of 8 cases. The 4th case did not clear. The question was to compare two linked lists and print 1 if all corresponding elements are equal and 0 otherwise. For this test case the expected output is 1 as all elements are equal but I got 0. I have included some extra prints of linked lists and comparisons I did to understand it. Well as it cleared 7 of 8 cases I would like to understand what is going wrong with this particular test case. Thank you in advance.

import java.util.LinkedList;
import java.util.Scanner;

public class compare_two_ll {
    public static void main(String[] args) {

        // initialising and taking inputs
        Scanner sc = new Scanner(System.in);
        int m = sc.nextInt();
        int n = sc.nextInt();
        LinkedList<Integer> l1 = new LinkedList<Integer>();
        for(int i=0;i<m;i++){
          l1.add(sc.nextInt());
        }
        LinkedList<Integer> l2 = new LinkedList<Integer>();
        for(int i=0;i<n;i++){
          l2.add(sc.nextInt());
        }

        // printing two linked lists
        for(Integer x:l1){
            System.out.print(x);
            System.out.print(" ");
        }
        System.out.println();
        for(Integer x:l2){
            System.out.print(x);
            System.out.print(" ");
        }
        System.out.println();


        boolean flag = true;
        if(m==n){
            for(int i=0;i<n;i++){
                if(l1.get(i)!=l2.get(i)){
                    // printing few next 4 lines trying to understand problem
                    System.out.println(l1.get(i)==l1.get(i));
                    System.out.println(Integer.valueOf(l1.get(i)) == Integer.valueOf(l2.get(i)));
                    System.out.println(l1.get(i));
                    System.out.println(l2.get(i));


                    System.out.println(0);
                    flag = false;
                    break;
                }
            }
            if(flag){
                System.out.println(1);
            }
        }else{
          System.out.println(0);
        }
        sc.close();
    }
}

The 4th test case was:

20 20 736 24 780 497 255 361 943 5 406 542 843 17 10 323 828 552 301 301 376 250 736 24 780 497 255 361 943 5 406 542 843 17 10 323 828 552 301 301 376 250

And output:

736 24 780 497 255 361 943 5 406 542 843 17 10 323 828 552 301 301 376 250 
736 24 780 497 255 361 943 5 406 542 843 17 10 323 828 552 301 301 376 250 
true
false
736
736
0

Simple Java LinkedList comparison problems

0 Answers0