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A. Diverse Strings A. Diverse Strings A string is called diverse if it contains consecutive (adjacent) letters of the Latin alphabet and each letter o 阅读全文
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B. Parity Alternated Deletions B. Parity Alternated Deletions Polycarp has an array aa consisting of nn integers. He wants to play a game with this ar 阅读全文
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C. Two Shuffled Sequences C. Two Shuffled Sequences Two integer sequences existed initially — one of them was strictly increasing, and the other one — 阅读全文
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D. Equalize Them All D. Equalize Them All You are given an array aa consisting of nn integers. You can perform the following operations arbitrary numb 阅读全文