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链接:https://codeforces.com/contest/1169/problem/A 题意: The circle line of the Roflanpolis subway has nn stations. There are two parallel routes in the s 阅读全文
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链接:https://ac.nowcoder.com/acm/contest/903/B 题意: Icebound hates math. But Imp loves math. One day, Imp gave icebound a problem. The problem is as foll 阅读全文
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链接:https://codeforces.com/contest/1167/problem/D 题意: A string is called bracket sequence if it does not contain any characters other than "(" and ")". 阅读全文
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链接:https://codeforces.com/contest/1167/problem/C 题意: In some social network, there are nn users communicating with each other in mm groups of friends. 阅读全文
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链接:https://codeforces.com/contest/1167/problem/B 题意: This is an interactive problem. Remember to flush your output while communicating with the testin 阅读全文
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链接:https://codeforces.com/contest/1167/problem/A 题意: A telephone number is a sequence of exactly 11 digits, where the first digit is 8. For example, t 阅读全文
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链接:https://codeforces.com/contest/1166/problem/C 题意: The legend of the foundation of Vectorland talks of two integers xx and yy. Centuries ago, the ar 阅读全文