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D. Bandit in a City 【树+并查集】1900

D. Bandit in a City Bandits appeared in the city! One of them is trying to catch as many citizens as he can. The city consists of 𝑛 squares connected...

树提高题

2020-11-12

0 755

F. The Shortest Statement 【树，LCA，最短路】2400

F. The Shortest Statement You are given a weighed undirected connected graph, consisting of 𝑛 vertices and 𝑚 edges. You should answer 𝑞 queries, th...

树提高题

2020-11-11

0 617

B. Kay and Snowflake 【树的重心】1900

B. Kay and Snowflake B. Kay and SnowflakeAfter the piece of a devilish mirror hit the Kay's eye, he is no longer interested in the beauty of the roses...

树提高题

2020-11-11

0 738