任务描述
实现代码
class MinStack: def __init__(self): """ initialize your data structure here. """ self.stack = [] def push(self, x: int) -> None: self.stack.append(x) def pop(self) -> None: self.stack.pop() def top(self) -> int: return self.stack[-1] def getMin(self) -> int: return min(self.stack) # 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()