Looking for CS50 Puzzle Day 2020, which is taking place September 4â7, 2020? Puzzles will not require prior programming experience, just logic and smarts. Participants who feel their submission has been disqualified in error should please let us know via this form so that we can review. 9% (830) had participated in one of the past three CS50x Puzzle Days, 2% (196) had participated in two, and 1% (63) had participated in them all! Berlin country. Fortunately at the last moment Erin realized that her phone number was actually written on Elphie’s dogtag, and we were able to Photoshop that out — didn’t want folks to think they had to call her up for the final clue :) We really liked the idea of a puzzle that had some physicality to it, as this one likely was solved by many folks by cutting out the pieces and rotating them. You don’t actually see the integer returned, although linux does save this value known as an “exit code.” You can see the value by echoing it out. medium.com/@cs50/this-was-cs50x-puzzle-day-2019-c98112adb467, Anytime after 00:00 on Friday, 3 April 2020 (in your own time zone), your team will download a packet of puzzles as a PDF from, Your team will then have until the end of Monday, 6 April 2020 (in your own time zone), to solve as many puzzles as you can. 3 0 obj Programming in some situations is more like solving a puzzle than just going through some task list of what to code. <> Based on some of the comments we received by email, on Facebook, and in the form itself, many of you seem to have agreed; we received more comments about this puzzle than any other. 16 0 obj It was intentionally a puzzle that had some misdirection in it (hence the final answer! Reviewing this code has made me realize there were probably better ways to have coded these solutions up. If I ran printf with just “Hello, world” there would not be a line break at the end which is a formatting problem. Frst we do some slick tricks on our num_of_coins variable. Solve as many of the puzzles as possible by 23:59:59 on Monday 1 April 2019. mechanical or tedious, I think the payoff was worth it. /Type /Font 2 0 obj Then we lost it… oops! 0:56. This may have dropped the difficulty a bit more than we anticipated, but it was probably worth doing nevertheless. That is why we multiply by 100. There are many types of escape sequences for tabs, newlines, and even alerts (beep noises). /Length 13408 With all that said, for every anomalous submission, there were many more honest solutions! Press question mark to learn the rest of the keyboard shortcuts. << The special syntax for the previous exit code is “$?.” Here is what that looks like: Sometimes the host environment has a different exit code. If you have a question about a puzzle, email puzzles@cs50.harvard.edu, and weâll do our best to reply! << But I completely solved only 2 of them. The clue about the Dakotas may also have been a bit too obscure. 186 divided by 25 is 7.44, but we are dealing with integer data types, which means the guillotine is going to truncate anything on the right side of the decimal. A super simple example is let’s say I have the number 1005. I registered for cs50x puzzle day. Looking back I really wish I used a repl (read – eval – print – loop) more often. Weâll then share them online if youâd like. /FontName /BCDEEE+GillSansMT I just now saw the answers published. Since you have to keep the numbers within certain bounds, and there are multiple bounds in some cases, it’s nice to separate the complex conditions from the actual logic. /MediaBox [ 0 0 612 792 ]
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