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May 20, 2014 at 1:21 comment added Sayan Bandyapadhyay Ya,as you didn't mention that before I assumed all the cities are connected in a linear fashion (the graph is a simple path).
May 20, 2014 at 1:14 comment added Wojciech Kulik Thank you for your answer! Unfortunately I didn't specified myself clearly enough. You assumed, that graph will be as simple as my example, but it can be any graph i.e. there can be also roads 0->2, 1->3 etc.
May 20, 2014 at 1:11 history edited Sayan Bandyapadhyay CC BY-SA 3.0
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May 20, 2014 at 1:05 history answered Sayan Bandyapadhyay CC BY-SA 3.0