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I spend my money in yarn stores and used book stores. Where do you want to spend yours?
Check out the project here.
Exercises for Programmers: 57 Challenges to Develop Your Coding Skills - Chapter 3, Paint a Room - L-Shaped - Here it gets a bit more interesting...the goal is L-shaped. I should have let people pick the kind of room and used one app. That's not a difficult mashu...