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import os

import sys

sys.path.append(os.path.dirname(os.path.abspath(os.path.dirname(__file__))))

# 1단계 위 부모폴더의 절대경로를 참조 path에 추가.

# sys.path.append(os.path.dirname(os.path.abspath(os.path.dirname((os.path.dirname(__file__)))))) - 2단계 위 부모 폴더의 절대경로를 참조 path에 추가.

from DoublyLinkedList.DoublyLinkedList import Node

from DoublyLinkedList.DoublyLinkedList import DoublyLinkedList

class ArrayStack:

def __init__(self):

self.data = []

def size(self):

return len(self.data)

def isEmpty(self):

return self.size() == 0

def push(self, item):

self.data.append(item)

def pop(self):

return self.data.pop()

def peek(self):

return self.data[-1]

class LinkedListStack:

def __init__(self):

self.data = DoublyLinkedList()

def size(self):

return self.data.getLength()

def isEmpty(self):

return self.size() == 0

def push(self, item):

node = Node(item)

self.data.insertAt(self.size() + 1, node)

def pop(self):

return self.data.popAt(self.size())

def peek(self):

return self.data.getAt(self.size()).data