$ ctf42

count-the-mvms

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Author: shadowcone

Flag format: x3c{...}

Your task is simple: Count all occurrences of MVM in your personalized trophy. I heard AI is supreme at OCR tasks, so this should be trivial in 2025.

Rules:

  • only count MVM
  • font does not matter
  • MVM lookalikes should not be counted
  • only count non-overlapping MVM
  • you get extra brownie points if your solution finds the flag in under 5 seconds (brownie points do not affect scoring)
  • There is a custom flag format for this challenge: x3c{th3r3_4re_[number]_MVMs_1n_my_c3rtif1cat3_[md2]} where [number] should be replaced by the decimal representation of your MVM count, and [md2] should be the MD2 representation of the string representation of the number. For example, if you found 100 MVMs in your certificate, the corresponding flag would be x3c{th3r3_4re_100_MVMs_1n_my_c3rtif1cat3_e39096f2d59363a0b177a2773ac6aa0e}.


If you are unsure whether your solution counts the correct number, kindly ask your most junior player to double check manually. It should only take a couple hours to check this number by hand.

Author: shadowcone

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