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Misha hacked the Codeforces site. Then he decided to let all the users change their handles. A user can now change his handle any numb... 阅读全文
posted @ 2018-01-24 22:57
StarHai
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Most crossword puzzle fans are used to anagrams — groups of words with the same letters in differentorders — for example OPTS, SPOT, S... 阅读全文
posted @ 2018-01-24 22:50
StarHai
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Leonid wants to become a glass carver (the person who creates beautiful artworks by cutting the glass). He already has a rectangular w... 阅读全文
posted @ 2018-01-24 22:42
StarHai
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There is a bag-like data structure, supporting two operations:1 x Throw an element x into the bag.2 Take out an element from the bag.G... 阅读全文
posted @ 2018-01-24 22:37
StarHai
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As the new term comes, the Ignatius Train Station is very busy nowadays. A lot of student want to get back to school by train(because ... 阅读全文
posted @ 2018-01-24 22:33
StarHai
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Alice and Bob play 5-in-a-row game. They have a playing field of size 10 × 10. In turns they put either crosses or noughts, one at a t... 阅读全文
posted @ 2018-01-24 22:11
StarHai
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Andy, 8, has a dream - he wants to produce hisvery own dictionary. This is not an easy task forhim, as the number of words that he kno... 阅读全文
posted @ 2018-01-24 21:00
StarHai
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There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number i has the typ... 阅读全文
posted @ 2018-01-24 20:46
StarHai
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You are given string s consists of opening and closing brackets of four kinds ,{}, [], (). There are two types of brackets: opening an... 阅读全文
posted @ 2018-01-24 20:39
StarHai
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Now our hero finds the door to the BEelzebub feng5166. He opens the door and finds feng5166 is about to kill our pretty Princess. But ... 阅读全文
posted @ 2018-01-24 20:29
StarHai
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