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A little girl loves problems on bitwise operations very much. Here's one of them. You are given two integers l and r. Let's consider the values of for 阅读全文
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Well, here is another math class task. In mathematics, GCD is the greatest common divisor, and it's an easy task to calculate the GCD between two posi 阅读全文
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There are some ambiguities when one writes Berland names with the letters of the Latin alphabet. For example, the Berland sound u can be written in th 阅读全文
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In a medieval kingdom, the economic crisis is raging. Milk drops fall, Economic indicators are deteriorating every day, money from the treasury disapp 阅读全文
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The Berland's capital has the form of a rectangle with sizes n × m quarters. All quarters are divided into three types: regular (labeled with the char 阅读全文
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Polycarp plans to conduct a load testing of its new project Fakebook. He already agreed with his friends that at certain points in time they will send 阅读全文
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A game field is a strip of 1 × n square cells. In some cells there are Packmen, in some cells — asterisks, other cells are empty. Packman can move to 阅读全文
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A. Trip For Meal Winnie-the-Pooh likes honey very much! That is why he decided to visit his friends. Winnie has got three best friends: Rabbit, Owl an 阅读全文
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A. Search for Pretty Integers You are given two lists of non-zero digits. Let's call an integer pretty if its (base 10) representation has at least on 阅读全文
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A new dog show on TV is starting next week. On the show dogs are required to demonstrate bottomless stomach, strategic thinking and self-preservation 阅读全文