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Phoenix has decided to become a scientist! He is currently investigating the growth of bacteria. Initially, on day 11, there is one bacterium with mas 阅读全文
posted @ 2020-05-02 16:55
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Phoenix has a string ss consisting of lowercase Latin letters. He wants to distribute all the letters of his string into kk non-empty strings a1,a2,…, 阅读全文
posted @ 2020-05-02 15:13
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Phoenix loves beautiful arrays. An array is beautiful if all its subarrays of length kk have the same sum. A subarray of an array is any sequence of c 阅读全文
posted @ 2020-05-02 14:56
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Phoenix has nn coins with weights 21,22,…,2n21,22,…,2n. He knows that nn is even. He wants to split the coins into two piles such that each pile has e 阅读全文
posted @ 2020-05-02 14:48
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