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Mahmoud has n line segments, the i-th of them has length ai. Ehab challenged him to use exactly 3 line segments to form a non-degenerate triangle. Mah 阅读全文
posted @ 2017-07-26 01:14
樱花落舞
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While Mahmoud and Ehab were practicing for IOI, they found a problem which name was Longest common subsequence. They solved it, and then Ehab challeng 阅读全文
posted @ 2017-07-26 01:11
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Problem Description KazaQ wears socks everyday.At the beginning, he has n pairs of socks numbered from 1 to n in his closets. Every morning, he puts o 阅读全文
posted @ 2017-07-26 01:00
樱花落舞
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Talented Mr.Tang has n strings consisting of only lower case characters. He wants to charge them with Balala Power (he could change each character ran 阅读全文
posted @ 2017-07-26 00:57
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Problem Description There is a youngster known for amateur propositions concerning several mathematical hard problems.Nowadays, he is preparing a thou 阅读全文
posted @ 2017-07-26 00:51
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