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https://ac.nowcoder.com/acm/contest/5758#description 做的迟了+只会水题.jpg 剩下的咕咕咕慢慢补 A. 题目描述 这里有一棵树，每个点和每条边都存在一个价值。对于树上点对的价值，包括点对的起点和终点以及路径上边权值之和，不包括路径上其他点值。 阅读全文
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During the quarantine, Sicromoft has more free time to create the new functions in "Celex-2021". The developers made a new function GAZ-GIZ, which inf 阅读全文
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You've been in love with Coronavirus-chan for a long time, but you didn't know where she lived until now. And just now you found out that she lives in 阅读全文
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Maria is the most active old lady in her house. She was tired of sitting at home. She decided to organize a ceremony against the coronavirus. She has 阅读全文
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Due to the coronavirus pandemic, city authorities obligated citizens to keep a social distance. The mayor of the city Semyon wants to light up Gluharn 阅读全文
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You are given an undirected graph without self-loops or multiple edges which consists of nn vertices and mm edges. Also you are given three integers n 阅读全文
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The statement of this problem is the same as the statement of problem C1. The only difference is that, in problem C1, nn is always even, and in C2, nn 阅读全文
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The statement of this problem is the same as the statement of problem C2. The only difference is that, in problem C1, nn is always even, and in C2, nn 阅读全文
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You are given a string ss such that each its character is either 1, 2, or 3. You have to choose the shortest contiguous substring of ss such that it c 阅读全文
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Polycarp has spent the entire day preparing problems for you. Now he has to sleep for at least aa minutes to feel refreshed. Polycarp can only wake up 阅读全文