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关于错误的答案我未考虑首数字为零的情况，不知道各位有没有遇到这个问题。 我的基本思想是把电话号码转化成数字(我觉得首字不会为零)，然后建立一个二叉排序数，加一个counter字段记录每个电话号码的重复次数，在中序遍历输出，不知有问题没？ 望各位大虾指教 Followed by:
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