static Solution.ListNode CreateListNode(List <int> L)
{
Solution.ListNode res = new Solution.ListNode(0);
var cur = res;
foreach (int i in L)
{
cur = cur.next = new Solution.ListNode(i);
}
return(res.next);
}
static string ListNode2String(Solution.ListNode L)
{
string s = "(";
while (L != null)
{
s += L.val.ToString() + "->";
L = L.next;
}
return(s.Substring(0, s.Length - 2) + ')');
}
