微信图片_20191221154119.jpg

class Solution:
    def __init__(self):
        self.stack = []
    def IsPopOrder(self, pushV, popV):
        # write code here
        if len(pushV) != len(popV):
            return False
        for i in pushV:
            self.stack.append(i)
            while popV and self.stack[-1] == popV[0]:
                self.stack.pop()
                del popV[0]
        if self.stack == [] and popV == []:
            return True
        else:
            return False