===========================
Generation #20
problem size = 100 -> 50
Heuristic #3, from e2):
objective = 20.00132, time = 0.2 s

problem size = 100 -> 100
Heuristic #3, from e2):
objective = 40.23791, time = 1.2 s

problem size = 100 -> 200
Heuristic #3, from e2):
objective = 57.40717, time = 5.1 s

