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题目描述 After returning with honour from ICPC(International Cat Programming Contest) World Finals, Tom decides to say goodbye to ICPC and start a new per 阅读全文
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Description Give a tree with n vertices,each edge has a length(positive integer less than 1001). Define dist(u,v)=The min distance between node u and 阅读全文
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题目描述 A template for an artwork is a white grid of n × m squares. The artwork will be created by painting q horizontal and vertical black strokes. A st 阅读全文
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题目描述 Illustration of exponial(3) (not to scale), Picture by C.M. de Talleyrand-Périgord via Wikimedia Commons Everybody loves big numbers (if you do n 阅读全文