class BSTSet(Set): def __init__(self): self.bst = BST() # 判断集合是否为空 def is_empty(self): return self.bst.is_empty() # 添加 ele 至集合 def add(self, ele): self.bst.add(ele) # 是否包含元素 ele def contains(self, ele): return self.bst.contains(ele) # 从集合内删除 ele def remove(self, ele): self.remove(ele) # 获取集合大小 def get_size(self): return self.bst.get_size()