摘要:
It is well known that AekdyCoin is good at string problems as well as number theory problems. When given a string s, we can write down all the non-empty prefixes of this string. For example:s: "abab"The prefixes are: "a", "ab", "aba", "abab"For each 阅读全文
posted @ 2014-02-06 14:17
acvc
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