===========================
Generation #20
problem size = 100 -> 50
Heuristic #8, from e2):
objective = 19.99961, time = 0.8 s

problem size = 100 -> 100
Heuristic #8, from e2):
objective = 40.23691, time = 5.3 s

problem size = 100 -> 200
Heuristic #8, from e2):
objective = 57.40624, time = 22.6 s

