2023.08.28 Today's Challenge

https://leetcode.com/problems/implement-stack-using-queues/

Implement Stack using Queues - LeetCode

리스트로 매우 간단하게 구현 가능

class MyStack:

    def __init__(self):
        self.st = []

    def push(self, x: int) -> None:
        self.st.append(x)

    def pop(self) -> int:
        return self.st.pop(-1)

    def top(self) -> int:
        return self.st[-1]

    def empty(self) -> bool:
        return False if len(self.st) else True