I recently completed a programming Matlab for Engineering class and learned of the broad world of challenges programming has to offer. Those that play games, you know what it's like to find a challenge, defeat, and conquer. So in this thread the idea is to come up with a programming idea, see who comes up with the best code, and show off your skills. There are 2 challenges I heard from a friend who took advanced computer programming classes at some university, and he suggested 2 of them in which he did not get a decent grade(even though they worked). First challenge, write up code for a sudoku puzzle, in less than 70 lines of code. Second, write up a program that lets the user open a program like paint on the computer, draw a bunch of lines connected to eachother, and have the computer take some kind of form, and follow those lines like a maze going from start to finish, in under 70 lines. I honestly have no idea where to begin with these so I can't give you any hints. Post code here.