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不会生成重复值的短网址算法

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Release： 2016-06-13 11:22:21
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求一个不会生成重复值的短网址算法
求一个不会生成重复值的短网址算法，网上找了一些，都有一定重复的概率，或者能提供一种重复概率最小的算法也行

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