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题目描述 Bobo has a directed graph G with n vertex labeled by 1,2,3,..n. Let D(i,j) be the number of edges from vertex i to vertex j on the shortest path. 阅读全文
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题目描述 Given an array of citations (each citation is a non-negative integer) of a researcher, write a function to compute the researcher's h-index. Acco 阅读全文
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由于全球变暖,岛国S的沿岸的海水不断上涨,形式岌岌可危。 S国的地图是由n*m个网格组成的,网格由.和#组成,#代表的区域是陆地,.和地图外面全是海水。 每天,海水将侵蚀相邻的陆地,即如果陆地与海水相邻的话,第二天就会变成海水。这里面的两块相邻表示两块之间公用一条边。 比如S国的地图是这样的: .. 阅读全文
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题目描述 The Signals’ Day has passed for a few days. Numerous sales promotion campaigns on the shopping sites make us forget that 11.11 is the Signals’ Da 阅读全文