instance:eil26.tsp m:4 alpha:0.250000 Q=2 nU:6 nW:19 lb:177.000000 ub:177.000000 6 0 1 2.00 0 5 1.00 0 6 1.00 0 11 2.00 0 21 2.00 5 6 1.00 3 2 21 1.00 3 11 1.00 4 11 1.00 177.000000