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Problem DescriptionThere are tons of problems about integer multiples. Despite the fact that the topic is not original, the content is highly challeng... 阅读全文
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DescriptionOn Planet MM-21, after their Olympic games this year, curling is getting popular. But the rules are somewhat different from ours. The game ... 阅读全文
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DescriptionThe ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four... 阅读全文
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Sudoku is a very simple task. A square table with 9 rows and 9 columns is divided to 9 smaller squares 3x3 as shown on the Figure. In some of the cell... 阅读全文
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You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be filled with rock.... 阅读全文
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DescriptionAfter going through the receipts from your car trip through Europe this summer, you realised that the gas prices varied between the cities ... 阅读全文
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DescriptionFlip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and ... 阅读全文