===========================
Generation #20
problem size = 100 -> 50
Heuristic #9, from e2):
objective = 19.99970, time = 0.1 s

problem size = 100 -> 100
Heuristic #9, from e2):
objective = 40.23740, time = 0.5 s

problem size = 100 -> 200
Heuristic #9, from e2):
objective = 57.40694, time = 1.7 s

