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Vova had a pretty weird sleeping schedule. There are hh hours in a day. Vova will sleep exactly nn times. The ii-th time he will sleep exactly after a 阅读全文
posted @ 2020-03-14 23:16
Vetsama
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The next lecture in a high school requires two topics to be discussed. The ii-th topic is interesting by aiaiunits for the teacher and by bibi units f 阅读全文
posted @ 2020-03-14 23:09
Vetsama
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There is a frog staying to the left of the string s=s1s2…sns=s1s2…sn consisting of nn characters (to be more precise, the frog initially stays at the 阅读全文
posted @ 2020-03-14 22:57
Vetsama
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You are given an array aa consisting of nn integers. Your task is to determine if aa has some subsequence of length at least 33 that is a palindrome. 阅读全文
posted @ 2020-03-14 22:56
Vetsama
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You are given some Tetris field consisting of nn columns. The initial height of the ii-th column of the field is aiai blocks. On top of these columns 阅读全文
posted @ 2020-03-14 22:52
Vetsama
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