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WA到死的来看下!我都无语了。。居然是这个原因WA掉

Posted by coolinging at 2011-02-13 20:18:32 on Problem 3740
我是学pascal的、、
读入的结束条件从eof改成seekeof,就AC了。。。

还有用DancingLinks TLE 的,应该是没有每次从1最少的列开始搜。(我觉得这个是DLX快的第二个原因。第一个是解决稀疏的矩阵时避免查找,另一个就是这个每次从1最少的列开始搜,类似于自动往最容易剪枝的地方剪[可能我理解有误,但是加上这句确实会快上许多])

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