Day8.java

public class Day8{
    public static void main(String[] args) {
        
    }
    class solution{
        public ListNode addTwo(ListNode l1, ListNode l2){
            ListNode dummy = new ListNode();
            ListNode temp = dummy;
            int carry = 0;
            while(l1 != null || l2 != null || carry == 1){
                int sum = 0;
                if (l1 != null) {
                    sum += l1.val;
                    l1 = l1.next;
                }
                if(l2 != null){
                    sum += l2.val;
                    l2 = l2.next;
                }
                sum += carry;
                carry += sum/10;
                ListNode node = new ListNode();
                temp.next = node;
                temp = temp.next;
            }
            return dummy.next;
        }
    }
}