So if the question is changed into from 1 -98, I cannot see the

For H-path,It is very hard to verify no solution.1-10,no solution,very simple case,as
there are solitary points...,for 1-98 each point has 2-4 degrees,maybe there are H-paths or not.There is key point,we should begin from lowest degree points to next lower degree points...,try...