Chapter 1: The Role of Algorithms in Computing

@fabioyamate @andrielfn @laurocaetano just finished the answers for chapter 1.

However didn't answer one of the exercises.
Just as a general note, don't you think it makes more sense to store the generated image on the shell's current directory? Suppose I want to convert a PDF that is under a directory that I only have read access. :bomb: I wouldn't be able to generate the images, even though all I need is read permissions on the source file.