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摘要： C. Marina and VasyaMarina loves strings of the same length and Vasya loves when there is a third string, different from them in exactly t characters. ... 阅读全文

摘要： A. Two BasesAfter seeing the "ALL YOUR BASE ARE BELONG TO US" meme for the first time, numbers X and Y realised that they have different bases, which ... 阅读全文

摘要： Ping pongN (3 ≤ N ≤ 20000) ping pong players live along a west-east street(consider the street as a line segment). Each player has a unique skill rank... 阅读全文

摘要： B. Kolya and TanyaKolya loves putting gnomes at the circle table and giving them coins, and Tanya loves studying triplets of gnomes, sitting in the ve... 阅读全文

摘要： A. Olesya and RodionOlesya loves numbers consisting of n digits, and Rodion only likes numbers that are divisible by t. Find some number that satisfie... 阅读全文

摘要： B. Robot's TaskRobot Doc is located in the hall, with n computers stand in a line, numbered from left to right from 1 to n. Each computer contains exa... 阅读全文

摘要： A. Asphalting RoadsCity X consists of n vertical and n horizontal infinite roads, forming n × n intersections. Roads (both vertical and horizontal) ar... 阅读全文

摘要： C. Developing SkillsPetya loves computer games. Finally a game that he's been waiting for so long came out!The main character of this game has n diffe... 阅读全文

摘要： A. Vasya the HipsterOne day Vasya the Hipster decided to count how many socks he had. It turned out that he had a red socks and b blue socks.According... 阅读全文