Implement Stack Using Queues Problem

Implement Stack Using Queues Problem — ExecCode Easy DSA Practice

Solve the Implement Stack Using Queues problem on ExecCode. Free online easy DSA practice in Design. Write and run code in Java, C++, Python — no signup required to run.

Problem description

Description You are given the input needed to solve Implement Stack Using Queues. Your task is to implement a last-in-first-out (LIFO) stack using only two queues. The implemented stack should support all the functions of a normal stack (push, top, pop, and empty). Implement the MyStack class: - void push(int x) Pushes element x to the top of the stack. Return the required answer exactly as shown in the examples.

Examples

Input {"data": "push 1\npush 2\ntop\npop\nempty"}; Output 2 2 false. Input {"data": "push 1\npush 2\npop\ntop\nempty"}; Output 2 1 false. Input {"data": "push 1\npush 2\npush 3\npop\npop\npop\nempty"}; Output 3 2 1 true

Constraints

1 <= x <= 9 At most 100 calls will be made to push, pop, top, and empty. All the calls to pop and top are valid.

Practice Implement Stack Using Queues free on ExecCode. Browse DSA problems, topic map, and placement guides.