#-*- coding: UTF-8 -*-
class MinStack(object):
def __init__(self):
"""
initialize your data structure here.
"""
self.Stack=[]
self.minStack=[]
def push(self, x):
"""
:type x: int
:rtype: void
"""
self.Stack.append(x)
if len(self.minStack)==0 or x<=self.minStack[-1]:
self.minStack.append(x)
def pop(self):
"""
:rtype: void
"""
if self.Stack!=None:
if self.top()==self.minStack[-1]:
self.minStack.pop()
self.Stack.pop()
def top(self):
"""
:rtype: int
"""
if self.Stack!=None:
return self.Stack[-1]
def getMin(self):
"""
:rtype: int
"""
if self.minStack!=None:
return self.minStack[-1]
# Your MinStack object will be instantiated and called as such:
# obj = MinStack()
# obj.push(x)
# obj.pop()
# param_3 = obj.top()
# param_4 = obj.getMin()