public static ListNode AddTwoNumbers(ListNode l1, ListNode l2)
{
bool plusDecade = false;
var result = new ListNode();
ListNode iterator = result;
do
{
var sum = (l1?.val ?? 0) + (l2?.val ?? 0);
if (plusDecade)
{
sum += 1;
}
if (sum >= 10)
{
sum -= 10;
plusDecade = true;
}
else
{
plusDecade = false;
}
if (result.next == null)
{
result.val = sum;
result.next = new ListNode();
}
else
{
iterator.next = new ListNode(sum);
iterator = iterator.next;
}
l1 = l1?.next;
l2 = l2?.next;
}while (l1 != null || l2 != null);
return(result);
}
public static ListNode RemoveElements(ListNode head, int val)
{
GetHead(head, val);
return(head);
}
public ListNode(int val = 0, ListNode next = null)
{
this.val = val;
this.next = next;
}