C++代码如下:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
class Solution
{
public:
    void push(int node) {
        while (!stack2.empty()) {
            stack1.push(stack2.top());
            stack2.pop();
        }
        stack1.push(node);
    }
    
    int pop() {
        int result;
        while (!stack1.empty()) {
            stack2.push(stack1.top());
            stack1.pop();
        }
        result = stack2.top();
        stack2.pop();
        return result;
    }
    
private:
    stack<int> stack1;
    stack<int> stack2;
};