Leetcode The finger of the sword Offer 30 The reference code of the title is as follows ：
class MinStack:
def __init__(self):
"""
initialize your data structure here.
"""
self.queue=[]
def push(self, x: int) -> None:
self.queue.insert(0,x)
def pop(self) -> None:
self.queue.pop(0)
def top(self) -> int:
return self.queue[0]
def min(self) -> int:
return min(self.queue)
# Your MinStack object will be instantiated and called as such:
# obj = MinStack()
# obj.push(x)
# obj.pop()
# param_3 = obj.top()
# param_4 = obj.min()Topic link ：
Power button 
https://leetcode.cn/problems/bao-han-minhan-shu-de-zhan-lcof
