Optimal solution to COVRP instance P-76-4:
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Route = 17 51 6 68 2 62 73 1 33 63 16 3 44 32 50 18 55 25 31, Demand = 323, RLen = 144.754959
Route = 26 12 40 9 39 72 58 10 38 65 66 11 53 14 59, Demand = 344, RLen = 101.154361
Route = 67 34 46 8 7 35 19 54 13 57 15 5 37 20 70 60 71 69 36 47 21 61, Demand = 348, RLen = 142.968351
Route = 75 4 52 27 45 29 48 30 74 28 22 64 42 43 41 56 23 49 24, Demand = 349, RLen = 134.067238
Sum of route lengths = 522.944910
CAP = 350
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