[srcreigh]

Yeah, you have to give it a solid effort for this to work. On day two if it's not solved yet, you have to give another solid effort before resting.

I'm not sure if in this scenario it's an option to solve the problem on the first go. Usually when I hit this scenario, I am simply unable to do it in the first place, but the next day is easy.

[yuuuuyu]

Right. Or you try to break it down into subproblems which may be easier to solve. And those are then candidates for the downhill parking on-ramp for next day.