Durante a Campus Party 2019 de Brasília (#CPBSB3) aconteceu o CTF First Blood, fruto de uma parceria entre o CTF-BR, Jerimum Hackerspace e o Calango H4cker Clube, com apoio da Decred (empresa que mantém a moeda digital autônoma Decred). A ideia desse post é percorrer os desafios apresentados aos participantes durante a competição e esboçar uma solução para cada um (não necessariamente a que fiz, mas uma que fique bonitinha no post).

Logos da Galere da Oganização.

MISC — Então Deus Criou o Mundo (30 pontos)

Descrição: No princípio criou Deus o céu e a terra. E a terra era sem forma e vazia; e havia trevas sobre a face do abismo; e o…


(portuguese version)

Super Gravitron Leet Edition (SGLE) was one of the PPC challenges in Pwn2Win 2018. This challenge was only accessible to competitors via VPN.

The description was the following:

Do you know the Super Gravitron by VVVVVV? Yes, Terry Cavanagh is a genius! And the bavs tasked with recruiting new programmers made a version of this game that runs on the console, and use it in their recruitment program! We're trying to infiltrate their IT sector, so we need your programming skills to beat the game, by creating a bot that can last 137 seconds in it!Instructions:
1 …


(versão em inglês)

Super Gravitron Leet Edition (SGLE) foi um dos desafios de PPC (programação) do Pwn2Win 2018 que estava acessível para os competidores somente via VPN, após a solução de alguns dos desafios iniciais.

A descrição do desafio era a seguinte:

Do you know the Super Gravitron by VVVVVV? Yes, Terry Cavanagh is a genius! And the bavs tasked with recruiting new programmers made a version of this game that runs on the console, and use it in their recruitment program! …


  1. Nowadays Machine Learning is more close to Alchemy than to Electricity.
  2. Science is built using building blocks to generate knowledge, and this is not necessarily true for Machine Learning.
  3. There are far to much experiments than justifications.
  4. Everyone is some kind of expert in Machine Learning after only replicates some Kaggle kernel.
  5. Is not a problem that some people do not understand how something works. But it is a problem when everyone does not know how something works.
  6. Several people argue that you only need basic skills in math and statistics to understand what is happening.
  7. Hype.

Some topics cited here are not mine by creation. But they are here because I used in a lot of empty talk that I use to have with friends and colleagues.

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