55 lines
770 B
Python
55 lines
770 B
Python
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class MinStack:
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def __init__(self):
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self.s1 = []
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self.s2 = []
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def push(self, num):
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self.s1.append( num )
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if len(self.s2)==0 or num < self.s2[-1]:
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self.s2.append( num )
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else:
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self.s2.append( self.s2[-1] )
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def pop(self):
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self.s2.pop()
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return self.s1.pop()
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def show(self):
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print(self.s1)
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print(self.s2)
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print("Min: ", self.s2[-1] )
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print('')
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def main():
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minStack = MinStack()
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minStack.push(3)
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minStack.show()
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minStack.push(1)
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minStack.show()
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minStack.push(2)
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minStack.show()
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minStack.pop()
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minStack.show()
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minStack.pop()
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minStack.show()
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if __name__ == "__main__":
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main()
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