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这道题就是求两点的最短距离,数据量不是很大,所以可以用求最短路的方法,Dij,BF都可以,当然优先队列广搜最快,注意还会有a a这样的相邻citys

Posted by alpc32 at 2010-01-13 23:48:30 on Problem 2169 and last updated at 2010-01-13 23:49:30


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