Method __find

python/0261-graph-valid-tree.py:43–46

(self, n: int)

    @return: true if it's a valid tree, or false
    """
    def __find(self, n: int) -> int:
        while n != self.parents.get(n, n):
            n = self.parents.get(n, n)
        return n

    def __connect(self, n: int, m: int) -> None:
        pn = self.__find(n)