MyQueue (leetcode-in-java 1.17 API)

java.lang.Object
- g0201_0300.s0232_implement_queue_using_stacks.MyQueue

```
public class MyQueue
extends Object
```
232 - Implement Queue using Stacks.

Easy

Implement a first in first out (FIFO) queue using only two stacks. The implemented queue should support all the functions of a normal queue (push, peek, pop, and empty).

Implement the MyQueue class:
- void push(int x) Pushes element x to the back of the queue.
- int pop() Removes the element from the front of the queue and returns it.
- int peek() Returns the element at the front of the queue.
- boolean empty() Returns true if the queue is empty, false otherwise.
Notes:
- You must use only standard operations of a stack, which means only push to top, peek/pop from top, size, and is empty operations are valid.
- Depending on your language, the stack may not be supported natively. You may simulate a stack using a list or deque (double-ended queue) as long as you use only a stack’s standard operations.
Example 1:

Input:
```
["MyQueue", "push", "push", "peek", "pop", "empty"]
[ [], [1], [2], [], [], []]
```
Output:
```
[null, null, null, 1, 1, false]
```
Explanation:
```
MyQueue myQueue = new MyQueue();
myQueue.push(1); // queue is: [1]
myQueue.push(2); // queue is: [1, 2] (leftmost is front of the queue)
myQueue.peek(); // return 1
myQueue.pop(); // return 1, queue is [2]
myQueue.empty(); // return false 
```
Constraints:
- 1 <= x <= 9
- At most 100 calls will be made to push, pop, peek, and empty.
- All the calls to pop and peek are valid.
Follow-up: Can you implement the queue such that each operation is amortized O(1) time complexity? In other words, performing n operations will take overall O(n) time even if one of those operations may take longer.

- Constructor Summary
  
  Constructors
  Constructor and Description
  
  MyQueue()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method and Description
  
  boolean empty()
  
  int peek()
  
  int pop()
  
  void push(int x)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructors
Constructor and Description
`MyQueue()`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`empty()`
`int`	`peek()`
`int`	`pop()`
`void`	`push(int x)`

Constructor Detail
- MyQueue
```
public MyQueue()
```

Method Detail

push
```
public void push(int x)
```

pop
```
public int pop()
```

peek
```
public int peek()
```

empty
```
public boolean empty()
```

Class MyQueue

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

MyQueue

Method Detail

push

pop

peek

empty