//private Dictionary<RandomListNode, RandomListNode> mMap
// = new Dictionary<RandomListNode, RandomListNode>();
//public RandomListNode Clone(RandomListNode pHead)
//{
// // write code here
// if (pHead == null) return null;
// if (mMap.ContainsKey(pHead)) return mMap[pHead];
// RandomListNode node = new RandomListNode(pHead.label);
// mMap[pHead] = node;
// node.next = Clone(pHead.next);
// node.random = Clone(pHead.random);
// return node;
//}
public RandomListNode Clone(RandomListNode pHead)
{
// write code here
if (pHead == null)
{
return(null);
}
RandomListNode p = pHead;
while (p != null)
{
RandomListNode q = p.next;
p.next = new RandomListNode(p.label);
p.next.next = q;
p = q;
}
p = pHead;
while (p != null)
{
if (p.random != null)
{
p.next.random = p.random.next;
}
p = p.next.next;
}
RandomListNode pClone = pHead.next;
p = pHead;
while (p.next != null)
{
RandomListNode q = p.next;
p.next = p.next.next;
p = q;
}
return(pClone);
}
public override bool Run()
{
Solution s = new Solution();
Random rnd = new Random();
int len = 100;
RandomListNode[] list = new RandomListNode[len];
HashSet <RandomListNode> set = new HashSet <RandomListNode>();
RandomListNode head = new RandomListNode(0);
list[0] = head;
set.Add(head);
for (int i = 1; i < len; i++)
{
RandomListNode node = new RandomListNode(i);
list[i] = node;
set.Add(node);
list[i - 1].next = node;
}
for (int i = 0; i < len; i++)
{
if (rnd.Next(100) < 50)
{
list[i].random = list[rnd.Next(len)];
}
}
RandomListNode clone = s.Clone(head);
RandomListNode p = head;
RandomListNode cp = clone;
while (p != null && cp != null)
{
if (set.Contains(cp))
{
return(false);
}
if (p.label != cp.label)
{
return(false);
}
if (p.random != null || cp.random != null)
{
if (p.random == null)
{
return(false);
}
if (cp.random == null)
{
return(false);
}
if (set.Contains(cp.random))
{
return(false);
}
if (p.random.label != cp.random.label)
{
return(false);
}
}
p = p.next;
cp = cp.next;
}
if (p != null)
{
return(false);
}
if (cp != null)
{
return(false);
}
return(true);
}