用两个栈实现队列

用两个栈来实现一个队列，完成队列的Push和Pop操作。 队列中的元素为int类型。

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using System.Collections.Generic;
class Solution
{
Stack stackPop=new Stack();
Stack stackPush=new Stack();
public void push(int node)
{
stackPush.Push(node);
}

public int pop() {    while(stackPush.Count!=0)    stackPop.Push(stackPush.Pop());            int res=stackPop.Pop();    while(stackPop.Count!=0)    stackPush.Push(stackPop.Pop());    return res;}

}