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48 lines (42 loc) · 821 Bytes
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225.cpp
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48 lines (42 loc) · 821 Bytes
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class MyStack {
public:
MyStack() {
}
void push(int x) {
tmp.push(x);
exchange();
res = tmp;
while(tmp.size())
{
tmp.pop();
}
}
int pop() {
int res_value = res.front();
res.pop();
return res_value;
}
int top() {
return res.front();
}
bool empty() {
return res.empty();
}
private:
queue<int> res, tmp;
void exchange() {
while(res.size())
{
tmp.push(res.front());
res.pop();
}
}
};
/**
* 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();
*/