static int findMergeNode(SinglyLinkedListNode head1, SinglyLinkedListNode head2) {
        SinglyLinkedListNode head1_curr = head1;
        SinglyLinkedListNode head2_curr = head2;
        
            while((head1_curr != head2_curr)){
            if(head1_curr.next == null){
                head1_curr = head2;
            }else{
                head1_curr= head1_curr.next;
            }
            if(head2_curr.next == null){
                head2_curr = head1;
            }else{
                head2_curr = head2_curr.next;
                }
                              
            }
            
            return head2_curr.data;
    }