Solution: Implement Queue Using Stacks
Explore how to implement a queue using two stacks in C#. This lesson helps you understand how to simulate FIFO behavior using LIFO stack operations by maintaining order during push and pop operations. You'll gain insights into time and space complexity while coding efficient queue operations using standard stack methods.
We'll cover the following...
Statement
Design a custom queue, MyQueue, using only two stacks. Implement the Push(), Pop(), Peek(), and Empty() methods:
- Void Push(int x): Pushes element to the back of the queue.
- Int Pop(): Removes and returns the element from the front of the queue.
- Int Peek(): Returns the element at the front of the queue.
- Boolean Empty(): Returns TRUE if the queue is empty. Otherwise FALSE.
You are required to only use the standard stack operations, which means that only the Push() to top, Peek() and Pop() from the top, Size(), and Is Empty() operations are valid.
Note: In some interview questions, Void Push(int x) and Int Pop() might be referred to as Void Enqueue(int x) and Int Dequeue(), respectively.
Constraints:
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x - A maximum of