void Pop()
{
if (top == null)
{
throw new Exception("No Element to POP");
}
SNode tempNode = top;
top = tempNode.NextSNode;
tempNode = null;
}
void Push(int x)
{
SNode newNode = new SNode(x);
if (top == null)
{
top = newNode;
return;
}
newNode.NextSNode = top;
top = newNode;
return;
}