===========================
Generation #20
problem size = 100 -> 50
Heuristic #4, from e2):
objective = 20.00209, time = 0.3 s

problem size = 100 -> 100
Heuristic #4, from e2):
objective = 40.23829, time = 1.0 s

problem size = 100 -> 200
Heuristic #4, from e2):
objective = 57.40735, time = 3.1 s

