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Cryptography Challenge #20!
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on 02:59:50 am 09/10/07 (edited 10:58:15 pm 09/14/10)
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This thread is for discussion of the Gendou.com Cryptography Challenge #20. Click the above link to view the challenge, get hints, and see the scoreboard. Please do NOT post spoilers! You may post your ideas and strategies, but no actual answers, ciphers, or code. 
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Re: Cryptography Challenge #20!
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on 07:08:54 am 09/26/07 |
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I have 2 questions, please answer if they're relevant: 1. Are we supposed to find what the picture is at time0? 2. The dots started moving to the left or to the right? Thanks.  |
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Re: Cryptography Challenge #20!
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on 07:14:56 am 09/26/07 |
I did it a quarter of the code and got all confused... I seem to have a few dots on the same line... is this normal?  A friend of today is an enemy of tomorrow. I am an empty shell. I don't feel loved at all |
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Re: Cryptography Challenge #20!
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Finished this one in a few minutes after seeing it... just waiting on Gendou Ivonne.... #1) yes, you are looking for what the pic was at T=0... #2) the dots randomly scattered.. each individual dot's speed remained the same, and trajectory is only affected by bouncing at a perfect reflective angle off a wall... look at the bouncing ball pic... the top left number is it's X, bottom left is it's Y, top right is DX, bottom right is DY.... with good enough eyes, you might notice that the values for DX and DY remain the same, except the sign of the two values keeps changing depending on the direction it's going Reinforce... well, "the goal is to recover the secret picture"... if the secret picture has a straight line in it, then this would be correct, otherwise it wouldn't be... |
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Re: Cryptography Challenge #20!
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on 08:53:09 am 09/27/07 (edited 10:23:10 pm 09/27/07)
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sent my answer to Gendou...i hope my answer is correct :P btw if i'm wrong can i send another answer??? =========================================================== edit : forunately my answer is correct :P   |
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Re: Cryptography Challenge #20!
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| yes, if you're ever wrong you can always send another and another... |
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Re: Cryptography Challenge #20!
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| I know how I would solve this, but I have neither the resources to automate the process nor the patience to do each by hand. Sorry. |
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Re: Cryptography Challenge #20!
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on 11:34:04 am 09/30/07 |
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Aww, Cauchy, if you solve a few points at random, you might see a pattern forming pretty quickly.
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Re: Cryptography Challenge #20!
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Do I have to send the image or just tell him what it is like?  |
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Re: Cryptography Challenge #20!
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on 10:58:54 pm 09/14/10 |
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This challenge was offline for a while, but has now been fixed and made available here!
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Re: Cryptography Challenge #20!
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on 09:23:51 pm 10/16/10 |
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