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/*/*******************************************************************************
** **
** Jiedi(China nanjing)Ltd. **
** 创建:丁宋涛 夏曹俊,此代码可用作为学习参考 **
*******************************************************************************/
/*****************************FILE INFOMATION***********************************
**
** Project : 算法设计与编程实践---基于leetcode的企业真题库
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// 算法设计与编程实践---基于leetcode的企业真题库 课程 QQ群296249312 下载代码和交流*/
/*
* @lc app=leetcode.cn id=232 lang=cpp
*
* [232] 用栈实现队列
*/
class MyQueue {
public:
/** Initialize your data structure here. */
MyQueue() {
}
/** Push element x to the back of queue. */
void push(int x) { // 将元素放入栈底
stack<int> temp;
while(s.empty() == false){
temp.push(s.top());
s.pop();
}
s.push(x);
while(temp.empty() == false){
s.push(temp.top());
temp.pop();
}
}
/** Removes the element from in front of queue and returns that element. */
int pop() {
int tmp = s.top();
s.pop();
return tmp;
}
/** Get the front element. */
int peek() {
return s.top();
}
/** Returns whether the queue is empty. */
bool empty() {
return s.empty();
}
private:
stack<int> s,temp;
};
/**
* Your MyQueue object will be instantiated and called as such:
* MyQueue* obj = new MyQueue();
* obj->push(x);
* int param_2 = obj->pop();
* int param_3 = obj->peek();
* bool param_4 = obj->empty();
*/