hack-Wind

Codeforces has a feature of hacking, during contests. Here hacking doesn’t mean illegitimately breaking into a computer system.
In hacking, you can view the solution of others. If you think that you have a test case where the code may give the wrong answer. Just click on the hack and provide your test case.
After the end of the Educational Rounds / (Div. 3) rounds there will be an 12-hour period of open hacks — any visitor of Codeforces may try to hack any complete solution to a problem of the last round (either from a contest, or practice), the source code of hacking solution is available (you can copy the text and, for example, stress it).
This script helps in automating that process by scraping and extracting all the submissions of a particular problem and testing it on your local Linux machine.

File Description

This script can be used for random/custom testing, random testing uses generator.cpp which generates random inputs for the problem, contains many prewritten functions for generating PRNS, Random tree generator, shuffler. You can modify generator for a particular problem that you are testing.
Before executing the script update generator.cpp and correct.cpp which contains the attacking code (possibly yours) for that problem.
lily.cpp is a temporary file in the testing process which stores defender code temporarily.

Clone this repository to your local Linux machine and update generator.cpp and correct.cpp for that problem.
Run git clone https://github.com/ubc-123/hack-Wind.git

Update get_urls.py by updating contest_id, problem_id, page_start, page_end variables.
For example contest_id = 1324, problem_id = 560265, page_start = 1, page_end = 4.
problem_id can be obtained by inspecting (Ctrl + Shift + C) the Standings page of that contest.
Now run python3 get_urls.py
The extracted URL's which are accepted submission URL's of that problem will be saved in urls.txt file.

Run python3 extract_source.py
This filters and extracts the C++ source code of all the accepted submissions and saves them in trash/ folder

Run bash hack.sh to test the submissions in trash/ folder with 100 random inputs.
In hack.sh random_tests is the number of random tests per defender code can be updated for intense testing it is set to 100 by default.
hack.sh can be edited for further custom testing with a particular input.
Successful hacks will be stored in the hacks.txt file, however, they will be displayed along with submission URL and Hacking input at the end of hacks.sh execution.

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change and add.