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The example in last page shoule be this. I make it wrong just now.

Posted by Nowitzki at 2007-03-04 15:13:09 on Problem 3205
In Reply To:What does this sentence "All the paths from s to t would pass this city." ? Posted by:Nowitzki at 2007-03-04 15:09:53

Is it means that I should only count the cities which are present in each of the paths from s to t?
For example.
6 6
0 1
0 2
0 3
0 4
1 4
4 5
6
The answer should be 1?

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