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"Codeforces 1215D Ticket Game 原题" 题目 Monocarp and Bicarp live in Berland, where every bus ticket consists of n digits (n is an even number). During th 阅读全文
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题目 \ define xhxj (Xin Hang senior sister(学姐)) If you do not know xhxj, then carefully reading the entire description is very important. As the stronge 阅读全文
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题目 Slastyona and her loyal dog Pushok are playing a meaningless game that is indeed very interesting. The game consists of multiple rounds. Its rules 阅读全文
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题目 Volodya is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beautiful if and only if it is divisible 阅读全文
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题目 An army of ants walk on a horizontal pole of length l cm, each with a constant speed of 1 cm/s. When a walking ant reaches an end of the pole, it i 阅读全文
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题目 The first stage of train system reform (that has been described in the problem Railways of the third stage of 14th Polish OI. However, one needs no 阅读全文
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题目 On another floor of the A.R.C. Markland N, the young man Simon "Xenon" Jackson, takes a break after finishing his project early (as always). Having 阅读全文
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The Japanese government plans to increase the number of inbound tourists to forty million in the year 2020, and sixty million in 2030. Not only increa 阅读全文
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题目 A Communist regime is trying to redistribute wealth in a village. They have have decided to sit everyone around a circular table. First, everyone h 阅读全文
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题目 Farmer John has arranged his N $(1 ≤ N ≤ 5,000)$ cows in a row and many of them are facing forward, like good cows. Some of them are facing backwar 阅读全文
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题目 In a village called Byteville, there are $n$ houses connected with $n 1$ roads. For each pair of houses, there is a unique way to get from one to a 阅读全文
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题目 NEKO ΦωΦ has just got a new maze game on her PC! The game's main puzzle is a maze, in the forms of a $2×n$ rectangle grid. NEKO's task is to lead a 阅读全文