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Re:也对，像这题的图多半是稀疏的图了。。。直接BFS找最短路，找邻接点时现算就可。。O(L+n)。所以先用O(n2)预处理反而不合算In Reply To:也对，像这题的图多半是稀疏的图了。。。直接BFS找最短路，找邻接点时现算就可。。O(L+n)。所以先用O(n2)预处理反而不合算 Posted by:hanjialong at 2008-08-27 18:16:05 我先计算临界阵就TLE，改了以后反而才500多ms Followed by: Post your reply here: |
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