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

solution cost   : 430.885
number of trips : 6

trip 1, 4 customers, sequence : 4 3 9 7 
   weight    : 56
   volume    : 587
   trip cost : 85.3851

trip 2, 2 customers, sequence : 8 17 
   weight    : 56
   volume    : 332
   trip cost : 42.6143

trip 3, 3 customers, sequence : 13 14 15 
   weight    : 54
   volume    : 364
   trip cost : 68.5792

trip 4, 2 customers, sequence : 2 1 
   weight    : 48
   volume    : 231
   trip cost : 34.3165

trip 5, 4 customers, sequence : 16 18 10 12 
   weight    : 57
   volume    : 541
   trip cost : 96.6767

trip 6, 5 customers, sequence : 6 19 11 20 5 
   weight    : 58
   volume    : 707
   trip cost : 103.313

__________________________________________________________

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

trip 1 - vehicule packing see 2l_cvrp0402_T1.png
-----------------
customer 4, list of items : 1 
customer 3, list of items : 2 3 
customer 9, list of items : 4 5 
customer 7, list of items : 6 7 

trip 2 - vehicule packing see 2l_cvrp0402_T2.png
-----------------
customer 8, list of items : 1 
customer 17, list of items : 2 3 

trip 3 - vehicule packing see 2l_cvrp0402_T3.png
-----------------
customer 13, list of items : 1 2 
customer 14, list of items : 3 
customer 15, list of items : 4 5 

trip 4 - vehicule packing see 2l_cvrp0402_T4.png
-----------------
customer 2, list of items : 1 
customer 1, list of items : 2 3 

trip 5 - vehicule packing see 2l_cvrp0402_T5.png
-----------------
customer 16, list of items : 1 
customer 18, list of items : 2 3 
customer 10, list of items : 4 5 
customer 12, list of items : 6 

trip 6 - vehicule packing see 2l_cvrp0402_T6.png
-----------------
customer 6, list of items : 1 2 
customer 19, list of items : 3 
customer 11, list of items : 4 5 
customer 20, list of items : 6 7 
customer 5, list of items : 8