Poète

intro hardware FCSC 2025 solved on

Description

Like a poet counting the syllables in their verses, you will have to count the instructions in a generated code. Awaken the artist within you to produce a program equivalent to the one provided (proof-of-elapsed-time.asm), but with minimal code size.

It will involve coding a loop with decrement and using relative jumps.

The function is inherently sequential and designed in such a way that it does not allow for algorithmic optimization, unless one knows the verification trap.

Files

  • docker-compose.yml
  • assembly.py
    20.84 KiB – db186ab7dfb5f5e7f4790f1afc951deda349a8a9565a57b6328da2ba89965525
  • crypto_accelerator.py
    5.34 KiB – fe3c3f0ef53ec9e4be03ac6843b59b9879e7c8102325e2f323c1adad1e80e192
  • proof-of-elapsed-time.asm
    516 B – be6fcafa362f82b44ac62a114c313d6ad7ac2d0e195818a7e0c9d62dfc81e676
  • proof-of-elapsed-time.py
    1.24 KiB – d9235619c559d3ca83b3ce36cb94ecc7c3d1a4556cf9dfc3404833a7d1af6ecc
  • machine.py
    19.96 KiB – 048716eab19f32556b08fbea73a07b641f29fa0ff795abd407ead484e3d5041c
  • vm.md
    27.75 KiB – 0d241df97205c1ea035561b006926949e768e749d997f43f50569e416ee11cdc

Author

Neige

Challenge Instructions

  1. First, download docker-compose.yml:
    curl https://hackropole.fr/challenges/fcsc2025-hardware-proof-of-elapsed-time/docker-compose.public.yml -o docker-compose.yml
  2. Launch the challenge by executing in the same folder:
    docker compose up
  3. Then, in another console, access the challenge with Netcat:
    nc localhost 4000
⚠️ Important: You must solve the challenge by interacting with the Docker container through the exposed network port. Any other way is not considered valid.

In case you encounter problems, please consult the FAQ.

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