[sage-support] Route inspection problem

[Jori Mäntysalo]

I was walking at 
https://kintulammi.fi/wp-content/uploads/Kintulammi_Opaskartta.jpg and 
hence wondered if Sagemath has a function to solve 
https://en.wikipedia.org/wiki/Route_inspection_problem . Didn't found any, 
is it hidden with some other name or module?

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Jori Mäntysalo