Optimal solution to COVRP instance P-19-2:
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Route = 6 7 2 1 10 12 14 4 11, Demand = 158, RLen = 80.523292
Route = 18 5 13 15 9 8 3 16 17, Demand = 152, RLen = 88.046311
Sum of route lengths = 168.569603
CAP = 160
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