CTF Write-ups 2013 is a community-driven repository that collects Capture The Flag (CTF) source files and write-ups from competitions that occurred in 2013. The repository serves as an archive where cybersecurity professionals and enthusiasts can access detailed solutions and explanations for various CTF challenges. Contributors can submit their own write-ups through pull requests, making it a collaborative resource for the cybersecurity community. The collection includes source files and documentation that detail how specific CTF challenges were solved, providing educational value for those learning about cybersecurity concepts and techniques. Users can also contribute corrections to existing solutions by submitting pull requests. The repository is part of a larger archive system that spans multiple years, with separate repositories maintained for CTF competitions from 2014, 2015, and 2016. This organizational structure allows users to find write-ups from specific time periods and track the evolution of CTF challenges over time.