# -*- coding: utf-8 -*-

class BiTree_Node():
    def __init__(self, val):
        self.value = val
        self.next = None


if __name__ == '__main__':
    pass
4df617cd97b0499839007dfa0337d97b46408ca9
<mask token>

class BiTree_Node:
    <mask token>


<mask token>

class BiTree_Node:

    def __init__(self, val):
        self.value = val
        self.next = None


<mask token>

class BiTree_Node:

    def __init__(self, val):
        self.value = val
        self.next = None


if __name__ == '__main__':
    pass

# -*- coding: utf-8 -*-

class BiTree_Node():
    def __init__(self, val):
        self.value = val
        self.next = None


if __name__ == '__main__':
    pass