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Problem Description You are given a number of case-sensitive strings of alphabetic characters, find the largest string X, such that either X, or its i 阅读全文
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Problem Description Clairewd is a member of FBI. After several years concealing in BUPT, she intercepted some important messages and she was preparing 阅读全文
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Problem Description 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 阅读全文
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Description The Genographic Project is a research partnership between IBM and The National Geographic Society that is analyzing DNA from hundreds of t 阅读全文