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E. The Contest A team of three programmers is going to play a contest. The contest consists of 𝑛 problems, numbered from 1 to 𝑛. Each problem is pri 阅读全文
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D. Yet Another Monster Killing Problem You play a computer game. In this game, you lead a party of 𝑚 heroes, and you have to clear a dungeon with 𝑛 阅读全文
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C. Dominated Subarray Let's call an array 𝑡 dominated by value 𝑣 in the next situation. At first, array 𝑡 should have at least 2 elements. Now, let 阅读全文
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B. Magic Stick Recently Petya walked in the forest and found a magic stick. Since Petya really likes numbers, the first thing he learned was spells fo 阅读全文
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A. Two Rival Students There are 𝑛 students in the row. And there are two rivalling students among them. The first one is in position 𝑎, the second i 阅读全文