2020年2月26日
PolandBall and Forest
摘要： PolandBall lives in a forest with his family. There are some trees in the forest. Trees are undirected acyclic graphs with k vertices and k - 1 edges, 阅读全文
posted @ 2020-02-26 23:49 DeaL57 阅读(194) 评论(0) 推荐(0)
Mahmoud and Ehab and the message
摘要： Mahmoud wants to send a message to his friend Ehab. Their language consists of n words numbered from 1 to n. Some words have the same meaning so there 阅读全文
posted @ 2020-02-26 21:09 DeaL57 阅读(154) 评论(0) 推荐(0)