Minetest Circuit Challenge – Google CTF 2019 Qualifier

Solving the Minetest Hardware Challenge from the Google CTF 2019 Qualifier.
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source: https://goindocal.com/

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  1. LiveOverflow says:

    If you liked this video, maybe checkout this related video: https://www.youtube.com/watch?v=PQPO5Z4lVTU&list=PLhixgUqwRTjzzBeFSHXrw9DnQtssdAwgG&index=14

  2. LinkiPinki says:

    Wouldn't your approach break completely, as soon as you put a single SR-Latch/Flipflop in there? I mean this is a pretty dumb circuit – if I change it so you have to put in 3 codes in the where one lever is like an "apply", your recursive function wouldn't have it so easy anymore

  3. Eelke Johnson says:

    How much time you need to solve a challenge like this?

  4. Muhammeth milhan says:

    What the fuck is this??..is this really real world hacking??..or youtube misguided me??..if this is real world hacking its disgusting..

  5. Olf Mombach says:

    I like how the red dot from 9:30 and on is from the intro

  6. Jochem Bonarius says:

    I'm here from the hardware world. Hello earthlings.

  7. Charlie King says:

    I hope, we'll get a clone, which will be better, than Minecraft.

  8. Ian Aviso says:

    When he say fuckkkk that literally killed me😂

  9. Spacelørd says:

    You're german?

  10. Mikat says:

    We had Z3 in school when learning reasoning and logic, pretty handy

  11. Ankit Khandelwal says:


  12. Christopher Yu says:

    holy shit

  13. Vini M. says:

    Nice video, really inspiring for people who want to find bugs.

    I wonder if you can kubectl to this cluster.

    13:33 hey, if you get access to the host, you can use strace to trace the container processes pid.

  14. Proxy says:

    6:42 this is why you never let programmers name stuff

  15. Jakiki6 says:

    Are you German?

  16. ChaosLeo07 says:

    Can you speak/write/understand German?

  17. snowoverride says:

    Well this is a weird Minecraft lets play.

    Jk, loved this episode really 🙂

  18. lemon glataitor says:

    it should be a worldwide worst punishment ever to have to solve this by hand.

  19. Da Penguin says:

    And now I'm modding in Minetest

  20. The ComradeSShow says:

    pReTty sTraIgHtfOrWaRd CHaLlEnGe

  21. Altair Carter says:

    Man i need to try that game out, looks fun.

  22. Li3 says:

    You can do the same thing in normal minecraft

  23. Luigi Super says:

    it has been awhile since I've seen your videos.
    I didn't realize who you was until I saw the intro and I was like "holy crap its this guy! I wonder how he's been?"

  24. Pumpkin says:

    It's Micheal J. Fox! 😂

  25. ҐEĦ Royale says:

    Ehre bist deutsch lol

  26. Lego Mini Movie Productions says:

    Minetest looks like 1 to 1 copy of minecraft, violating copyright laws…

  27. Fucking Retard says:

    I have no idea what the hell you’re talking about, thank you for the video

  28. yeet master3000 says:

    my brain is to small for this

  29. jpplf13 Gaming says:

    I love how he says boolean

  30. Tiago Lucas Castro says:

    I understand absolutely nothing about programming, and still watched the video and found it really interesting! I only wish I had more time to learn it.

  31. jazmin says:

    These challenges look so much fun to complete but…. How on Earth do u Manage to solve all of that

  32. Robin bouchardon says:

    Do you know you are the look-alike of Gonzague, a French youtuber. Its breath-taking

  33. Bryceton Meadows says:

    This dude looks like Michael Cera

  34. Lich Slayer says:

    So can you explain that one more time?

  35. Olanga says:

    Jaja, wenn alle deutschen Minecraft/Minetest Genies sich zusammen tun würden hätten wir die Weltherrschaft safe 😀 Mal ehrlich Docm77 und du alleine habt mehr Gehirnzellen als meine gesamte Stadt 😀

  36. Matthew Luna says:

    Currently 5am and this was on my recommended. Have no idea what is happening but it was interesting😂

  37. Rampage Gaming says:

    i think i found a faster solution (simpler to program and set up), so the output is a 40 digit string of binary representing 40 levers and which state they're in.

    a 40 digit binary string has a max value of 1.099.511.627.775.

    my idea is to create a program that essentially counts up in binary until the output is triggered then it stops.

    you'd still need to parse it and all but the coding wouldn't be as rigorous as the maze solver you made.

    in the end, im fairly sure it'd take only around 4 hours for it to reach the correct value of 984.718.500.249.

    basically, neither you nor the computer really needs to know what the circuit actually does, all you need is for the circuit to be simulated and for the program to be able to tell when it's got the right answer.

    disclaimer: i am not a programmer nor do i ever plan on being one, this was just an idea i had while watching and i did some googling to figure out some numbers behind it. i don't really know how hard it would be to make and im certain it'd be a lot less graceful than your solution, but in my mind it still has potential of being faster primarily due to set up and all.

  38. Brodie McInnes says:

    I don’t have a clue what he’s talking about but it’s entertaining to watch his problem solving, nice 😀

  39. MachiToons - Machimations says:

    the amount of recursion could probaply fry my laptop CPU haha or python just straigt up throws me an recursion depth error (thats what it was called right?)

  40. Jeremy Huang says:

    Sorry. What the fuck…………

  41. unknown void says:

    why don't you just put a binary counter on the beginning and have it send a flag back when you receive a output, you don't even have to program anything you just make the circuit get something to eat come back and its done

  42. C 139 says:

    Michael cera but no cocaine addiction. That's what i thought when i saw your face.

  43. Angh balahr says:

    Never let someone from Bethesdas echelon watch one of these videos, or their heads might experience the life-feature of spontaneous implosion.

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