This is my repository of solved problems from online judges such as UVa, LightOJ, Live Archive, Codeforces, SPOJ, etc.
All of this is released into the public domain; feel free to do whatever you want with this.
In case you're interested, I maintain a blog about algorithm problems, which you can read here: On Algorithm Problems. In particular, if you're a beginner, you may find it useful to read this page where I have posted my advice for people who are starting their journey in the world of algorithm problems and competitive programming.
Have fun!