package LeetCode;

public class LC_2_wrong {
    public class ListNode {
        long val;
        ListNode next;

        ListNode() {
        }

        ListNode(long val) {
            this.val = val;
        }

        ListNode(long val, ListNode next) {
            this.val = val;
            this.next = next;
        }
    }

    public ListNode addTwoNumbers(ListNode l1, ListNode l2) {
        long num1 = 0;
        long num2 = 0;
        ListNode p1 = l1;
        ListNode p2 = l2;
        long idx = 0;
        while (p1 != null) {
            num1 += p1.val * Math.pow(10, idx);
            idx++;
            p1 = p1.next;
        }
        idx = 0;
        while (p2 != null) {
            num2 += p2.val * Math.pow(10, idx);
            idx++;
            p2 = p2.next;
        }
        long resNum = num1 + num2;
        if (resNum == 0) {
            return new ListNode(0);
        }
        long tmp = 0;
        ListNode res = new ListNode();
        ListNode p3 = res;
        while (resNum != 0) {
            tmp = resNum % 10;
            resNum /= 10;
            p3.next = new ListNode(tmp);
            p3 = p3.next;
        }
        return res.next;
    }
}