The files containing the LDdDGRP instances have the following format:

NOMBRE: <name of the instance>
DEPOT: <depot vertex>
VERTICES: <number of vertices>
ARISTAS_REQ: <number of required edges>
VERTICES_REQ: <number of required vertices not incident with required edges>
LISTA_ARISTAS_REQ:
(<u1>,<u2>) coste <c>
.
.
.
LISTA_VERTICES_REQ:
<vr1> coste <cvr1> demanda <dvr1>
<vr2> coste <cvr2> demanda <dvr2>
.
.
.
COORDENADAS :
<n1>	<x1>	<y1>
<n2>	<x2>	<y2>
...

For each required edge from node <u1> to node <u2> there is a line 

	(<u1>,<u2>) cost <c>

where <c> is the cost of traversing the edge. 

The list of required vertices is given after "LISTA_VERTICES_REQ:". Each line contains

	<vr1> coste <cvr1> demanda <dvr1>

where <vr1> is the number of the required vertex, <cvr1> is the service cost and <dvr1> the demand.

The coordinates of all the vertices are given after "COORDENADAS :".