[理工] [離散] 100中山資工
竟然在99北大資工看到Orz
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Prove the following statement.
For n >= 1, let a_1, a_2, ..., a_n be a sequence of n integers where they
are not necessarily positive and not necessarily all distinct.
Then there exists a non-empty subsequence a_i, a_i+1, ..., a_j such that
the sum a_i + a_i+1 + ... + a_j is a multiple of n.
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我是覺得北大的題意我比較看得懂
中山莫名其妙來個k...題意看不懂Orz
有沒有人會解這題呢?
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