Solution: Implement Queue Using Stacks
Explore how to build a custom queue using two stacks by mastering Push, Pop, Peek, and Empty operations. Understand how to preserve FIFO order with stack operations, optimize time and space complexity, and apply this approach in coding interviews focused on data structure design patterns.
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 ...