I agree with hi19hi19, the correct route was disappointing. I don't know. Maybe because by the look of it, it seems we would have big work. But the correct side is rapidly clear and the optimization relative straight. There is no special trick. There is one right route and we arrange it a bit to win.
For me, it was obvious what target was the correct one, and knowing it, it was easy to figure out the winning route. A bit optimization did it from there.
