CPSPC 2010 Sailor
Difference between en1 and en2, changed 4 character(s)
I was trying to solve [this problem.](http://mo.mff.cuni.cz/cpspc/2010/2-sailor-plen.pdf)↵
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I could only figure out the naive solution. (DFS from each vertex) I think I have encountered similar problems before but I couldn't solve them either. How do I solve this kind of problem?

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en2 English zscoder 2016-05-11 16:27:05 4 Tiny change: '/2-sailor-pl.pdf)\n\nI' -> '/2-sailor-en.pdf)\n\nI'
en1 English zscoder 2016-05-11 15:59:33 296 Initial revision (published)