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Airgapp CTF

On the 2nd of May 2020 Thugcrowd ran AIRGAPP, and along side this conference they hosted a CTF. I worked with the CTF_Circle team and we finished 1st overall!

Discord (Captured, 10pts)

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omg, hi yall, ive finally got round to my bggp6 entry!!! :cat_XD::cat_3nod:

[code][/code]

:angelleft::cat_ninja::angelright: yoinking an idea from [url=https://github.com/binarygolf/BGGP/tree/main/2024/entries/Luna%20Hart]Luna Hart's BGGP5 submission[/url], I started with a just a pure clone of here submission... a file named `curl -L binary.golf --request-target 5%2f5` with contents:

[code]$0[/code]

(Side Note: she and i were working this out together (all credit to her tho) a couple years ago when that was the challenge, i was desperate to make using the filename to work with wget's args, she got it working with curl... im still sad i never got it playing nice with wget... this isnt my redemption... instead im continuing to leach off her better solution!)

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program ranshirand
    common /ranbuf/ mbuff(130)

    real*4 a(1024)                                                                      ! size of array to fill with random numbers

    call ranvin(1337,100)                                                               ! seed and number of generations to warm up mbuff for
    call ranshi(size(a),a)
    print *, a

    contains

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Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium

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Tuning a cluster to get the highest possible scores is an art all of its own - with compiler optimisations, customised math libraries, etc. However these scores are from the standard hpcc binary package in Ubuntu 16.04.4, using the default configuration.
# Setup on each node
apt install hpcc
swapoff -a
adduser mpiuser

# Controller node setup
su - mpiuser
cp /usr/share/doc/hpcc/examples/_hpccinf.txt hpccinf.txt
# Edit default hpccinf.txt so that NB=80, N=18560, P=8 and Q=12 (P x Q = 96 cores)

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/*
 * ------------------------------------------------------------
 * "THE MONSTERWARE LICENSE" (Revision 01):
 * <author> wrote this code. As long as you retain this 
 * notice, you can do whatever you want with this stuff. If we
 * meet someday, and you think this stuff is worth it, you can
 * buy me a Monster Energy® energy drink in return.
 * ------------------------------------------------------------
 */

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