50
 0 30 40 0
 1 37 52 7 
 2 49 49 30 
 3 52 64 16 
 4 20 26 9 
 5 40 30 21 
 6 21 47 15 
 7 17 63 19 
 8 31 62 23 
 9 52 33 11 
 10 51 21 5 
 11 42 41 19 
 12 31 32 29 
 13 5 25 23 
 14 12 42 21 
 15 36 16 10 
 16 52 41 15 
 17 27 23 3 
 18 17 33 41 
 19 13 13 9 
 20 57 58 28 
 21 62 42 8 
 22 42 57 8 
 23 16 57 16 
 24 8 52 10 
 25 7 38 28 
 26 27 68 7 
 27 30 48 15 
 28 43 67 14 
 29 58 48 6 
 30 58 27 19 
 31 37 69 11 
 32 38 46 12 
 33 46 10 23 
 34 61 33 26 
 35 62 63 17 
 36 63 69 6 
 37 32 22 9 
 38 45 35 15 
 39 59 15 14 
 40 5 6 7 
 41 10 17 27 
 42 21 10 13 
 43 5 64 11 
 44 30 15 16 
 45 39 10 10 
 46 32 39 5 
 47 25 32 25 
 48 25 55 17 
 49 48 28 18 
 50 56 37 10 
//Vehicles characteristics: volume, fixed cost, variable cost, number available
//See E. D. Taillard, "A heuristic column generation method for the heterogeneous fleet vrp"
//RAIRO Rech. Opér. 33 (1) 1999, pp 1-14)
//see http://ina2.eivd.ch/collaborateurs/etd/articles.dir/vrphen.pdf
50 100 1.0 4
100 250 1.6 3
160 450 2.0 2

12 160 0 9999999 798.063541 + 8*100 + 4*250 = 2598.06
   4  24  43   7  26   1888114
   3  11  16  38   1470725
   2  25  14   1476007
   3   6  23  48   1476130
   3  28  31   8   1675334
   3   1   2  32   1476635
   2   4  18   1395853
   2  47  27   1341971
   7  12  37  15  45  33  39  10   3412795
   7  13  41  40  19  42  44  17   3559482
   6   5  49  30  34   9  46   3212631
   8  22   3  36  35  20  29  21  50   3594959