DEFKTHON CTF 2014 - Flag is Here! - Misc 200 Write-up

In this challange we were given a txt file which contains many lines and on each line it was containing 3 integers seperated with comma, and each of these integers was between [0,255] so we thought it might be a RGB formatted image and write a python script to get the image.

The problem was we were not given any size info :( so we keep trying different size's (but we know total count of pixels so when you know one of the w or h the other one most be number_of_lines/known_size) and we get a size of 126x488(wxh) and the image was:

And there is the python script