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Puzzling

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    $\begingroup$ In your example there are missing paths between cities (for example you can't get from A to C). The question says "Between every pair of cities, there is a fixed travel cost to go from one city to the other." $\endgroup$ Commented Oct 17, 2016 at 13:37
  • $\begingroup$ @Meiffert: I will look at it $\endgroup$ Commented Oct 17, 2016 at 13:39
  • $\begingroup$ Wont work. Already tried it with all possible combinations $\endgroup$ Commented Oct 17, 2016 at 14:25