Optimal solution to COVRP instance B-31-5:
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Route = 2 10 27 20, Demand = 38, RLen = 97.396018
Route = 8 23 13 17 9 6 3, Demand = 99, RLen = 61.121098
Route = 21 16 18 5 25 4 29, Demand = 86, RLen = 65.776802
Route = 22 1 19 24 11 15 14, Demand = 100, RLen = 82.075970
Route = 26 28 12 30 7, Demand = 89, RLen = 56.355158
Sum of route lengths = 362.725045
CAP = 100
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