MP K-DGRP instances data have the following format:

NOMBRE : <name of the instance>
VERTICES ORIGINALES : <number of vertices>
VERTICES REQUERIDOS : <number of required vertices>
VERTICES TOTALES : <number of vertices once the lines have been split>
DEPOT : <depot vertex>
LINEAS ORIGINALES : <number of lines>
LINE <v1> <v2> <c> <n>
	<u1> <c1>
	<u2> <c2>
...
	<un> <cn>

...

VERTICES REQUERIDOS : 
<nr1>	<cnr1>	<dnr1>
<nr2>	<cnr2>	<dnr2>
...

COORDENADAS :
<n1>	<x1>	<y1>
<n2>	<x2>	<y2>
...

<v1> and <v2> are the end vertices of the lines, <c> is the total cost of serving the line and <n> is the number of segments into which the line is split.

<u1>, <u2>,... <un> are the vertices created to split the line, where <un>=<v2>., and <c1>, <c2>,... are the costs of the corresponding segments.

<nr1>, <nr2>,... are the required vertices

<cnr1>, <cnr2>,... are the service costs of the required vertices

<dnr1>, <dnr2>,... are the demands of the required vertices

<n1>, <n2>,... are the vertices (including the ones used to split the lines) and <x1> <y1>, <x2> <y2> are the corresponding coordinates.