Optimal solution to COVRP instance F-72-4:
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Route = 20 29 23 24 25 26 30 21 22 28 27 49 51 70 50 47 48 44 42 43 46 53 45 52, Demand = 28236, RLen = 52.551796
Route = 31 32 34 54 55 41 57 56 60 61 58 59 63 62 64 65 66 67 39 68 69 37 38 40, Demand = 26772, RLen = 51.371355
Route = 33 14 15 1 71 6 10 5 3 8 4 7 9, Demand = 29838, RLen = 48.377540
Route = 36 35 18 11 19 2 17 16 12 13, Demand = 29994, RLen = 24.698220
Sum of route lengths = 176.998910
CAP = 30000
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