class MyStack {
public:
queue<int> q, sq;
MyStack() {
}
void push(int x) {
q.push(x);
}
int pop() {
while (q.size() > 1) {
sq.push(q.front());
q.pop();
}
int res = q.front();
q.pop();
while (!sq.empty()) {
q.push(sq.front());
sq.pop();
}
return res;
}
int top() {
return q.back();
}
bool empty() {
return q.empty();
}
};
/**
* Your MyStack object will be instantiated and called as such:
* MyStack* obj = new MyStack();
* obj->push(x);
* int param_2 = obj->pop();
* int param_3 = obj->top();
* bool param_4 = obj->empty();
*/