// file TestEqualList2


// Singly linked list
//
import java.util.*;

class IntList2  {
   private int value;
   private IntList2 next;
  
   public IntList2(int v, IntList2 n) {
       value = v;  next=n; }

   public boolean equals(IntList2 m) {
       IntList2 l = this;
       while (l != null && m != null)  {
         if (l.value != m.value)
            return false;
         l=l.next;
         m=m.next;
        }
      return ((l == null) && (m == null));
   }  // end equals

}  // end IntList2

public class TestEqualLists2 { 

public static void main(String[] args) {
        IntList2 n2 = new IntList2(12,null);
        IntList2 n1 = new IntList2(9,n2);
        IntList2 m2 = new IntList2(12,null);
        IntList2 m1 = new IntList2(9,m2);
        IntList2 q1 = m1;
        System.out.println("m1.equals(n1): " + m1.equals(n1));
        System.out.println("m1.equals(q1): " + m1.equals(q1));
        System.out.println("m1 == n1: " + (m1 == n1));
        System.out.println("m1 == q1: " + (m1 == q1));
     }
}