Add Antoine Mathys's solution to the 2025/ferguson fun challenge 4.

[antoine-mathys]

No description provided.

[xexyl]

I will look at this in the morning.

Setting a reminder.

Apologies I can't do much. Severe anaemia.

(I believe it is a question not code and I am sure you're right though.)

[xexyl]

I will look at this in the morning.

Setting a reminder.

Apologies I can't do much. Severe anaemia.

(I believe it is a question not code and I am sure you're right though.)

Actually .. I guess Landon will know well enough. I know that I added those other challenges and there are some really subtle things.

Still I am curious what you did (positively of course!).

Hope you enjoyed it.

[antoine-mathys]

I did enjoy this challenge, although I haven't cracked the way you scrambled S yet! On another note, please don't apologize. Your health comes first. I hope you'll feel better soon.

[xexyl]

I did enjoy this challenge, although I haven't cracked the way you scrambled S yet!

On another note, please don't apologize. Your health comes first. I hope you'll feel better soon.

Oh thank you! I was actually going to try and clarify.

Yes it's been rough but I am genuinely interested in what you have done!

As for S. Yes that's a fun one! I would be very interested if you can figure it out!

I must admit that I don't think I can decipher it any more either but if you need some help what MIGHT help (but it's a lot of output) is debug.c.

Good luck!

And now yes I must go. I will eventually look at your answer.

Btw: if it's indeed not code I BELIEVE (maybe ask @lcn2 ) you can put the answer in the challenges file itself.

[lcn2]

Well done @antoine-mathys

We will process your PR. In a bit later, the web site will be updated.

[xexyl]

Well done @antoine-mathys

We will process your PR. In a bit later, the web site will be updated.

I look forward to seeing it (when I have the energy)!

I actually don't know which one this is so it will be a nice surprise for me too.

@antoine-mathys other tips for S MIGHT be in the obfuscation.html file and possibly in index.html (summary maybe)? I am pretty sure I talked about how the table is used some but it's certainly not fully detailed.

Still IF you want some tips those places along with debug.c output MIGHT be useful but that array (which debug.c shows) is heavily mutated quite rapidly.

It's pretty interesting though and I would be very interested to see what you come up with!

Have a great day (or night or afternoon)!

(And yes well done indeed!)

[xexyl]

Ohhh now I know why you made it your own repo!

That's quite detailed. I hope that I can look at that in the future. I am impressed; it's much more than I expected when I posed that question!

Great job.

[antoine-mathys]

@xexyl
Thank you.