Optimal solution to COVRP instance A-37-6:
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Route = 6 20 1 33 9 21 2 28, Demand = 96, RLen = 124.940875
Route = 13 30 15 32, Demand = 92, RLen = 80.652961
Route = 14 18 26 10 11 12 22 23, Demand = 99, RLen = 134.774449
Route = 16 25 35 27, Demand = 95, RLen = 69.895645
Route = 24 7 4 17 34 31 19, Demand = 99, RLen = 62.900960
Route = 29 36 8 3 5, Demand = 89, RLen = 107.907787
Sum of route lengths = 581.072676
CAP = 100
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