option seed=0;
set nodes /1*100/;
parameter offset(nodes);
offset(nodes) = round(uniform(2,5));

alias (i,j,nodes);
set arcs(nodes,nodes);
arcs(i,j) = no;
arcs(i,i+1) = yes;
arcs(i,i+offset(i)) = yes;

set k /1*3/;
parameter demand(nodes,k) /
  1.1 -70
  6.1 70
  3.2 -25
  100.2 25
  4.3 -20
  8.3 20
  54.1 -70
  55.1 70
  23.2 -25
  89.2 25
  10.3 -20
  89.3 20
  20.3 -10
  50.3 10

  /;

parameter capacity(i,j);
capacity(i,j) = uniform(75,85);