The files containing the OARP instances have the following format:

NAME (or NUMBER): <name of the instance>
NUMBER OF VERTICES: <number of vertices>
NUMBER OF ARCS: <number of arcs>
TIME LIMIT: 1000      (PLEASE IGNORE THIS LINE)
LIST OF ARCS:
(<u1>,<u2>) cost <c>
.
.
.
PROFITABLE AND REQUIRED ARCS
(<u1>,<u2>) profit <p>
(<u3>,<u4>) required
.
.
.
DEPOT: 1





LIST OF ARCS: for each arc from node u1 to node u2 there is a line
(<u1>,<u2>) cost <c>
where c is the cost of traversing the arc.


PROFITABLE AND REQUIRED ARCS: 
For each required arc from node u1 to node u2 there is a line 
	(<u1>,<u2>) required.
For each profitable arc from node u1 to node u2 there is a line 
	(<u1>,<u2>) profit <p>  
where p is the profit collected when the arc is traversed (only the first time).

DEPOT: 1
Vertex 1 is the depot.


NOTE: The Tmax values can be found in the .xls file containing the results (OARP_solutions).