----------------  SOLUTION  -------------------

solution cost   : 364.454
number of trips : 4

trip 1, 6 customers, sequence : 12 10 19 11 20 6 
   weight    : 84
   volume    : 712
   trip cost : 105.881

trip 2, 4 customers, sequence : 2 5 7 8 
   weight    : 83
   volume    : 570
   trip cost : 65.134

trip 3, 4 customers, sequence : 4 15 3 9 
   weight    : 81
   volume    : 614
   trip cost : 83.9952

trip 4, 6 customers, sequence : 1 18 16 13 14 17 
   weight    : 81
   volume    : 583
   trip cost : 109.443

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----------------  BIN PACKING  -------------------

trip 1 - vehicule packing see 2l_cvrp0304_T1.png
-----------------
customer 12, list of items : 1 
customer 10, list of items : 2 
customer 19, list of items : 3 4 5 
customer 11, list of items : 6 
customer 20, list of items : 7 
customer 6, list of items : 8 9 10 11 

trip 2 - vehicule packing see 2l_cvrp0304_T2.png
-----------------
customer 2, list of items : 1 2 3 4 
customer 5, list of items : 5 6 
customer 7, list of items : 7 8 9 
customer 8, list of items : 10 

trip 3 - vehicule packing see 2l_cvrp0304_T3.png
-----------------
customer 4, list of items : 1 2 3 4 
customer 15, list of items : 5 6 7 8 
customer 3, list of items : 9 
customer 9, list of items : 10 

trip 4 - vehicule packing see 2l_cvrp0304_T4.png
-----------------
customer 1, list of items : 1 
customer 18, list of items : 2 
customer 16, list of items : 3 
customer 13, list of items : 4 5 
customer 14, list of items : 6 7 8 9 
customer 17, list of items : 10 11 12 13