Big O

A big collection of data structures and algorithms puzzles. As on May 2013, the repository has roughly 130 problems with solutions.

Solutions are primarily in Java (under java/). Some solutions are in Ruby (under ruby/).

Problem statements are specified as Javadoc at the top of every solution. I have tried to be as descriptive as I can, but if something is not clear then please do let me know! Problems are broadly classified into the following categories which are self explanatory.

Please feel free to contribute!

• arrays/
• binarytrees/
• bitsandbytes/
• cache/
• collections/
• concurrency/
• dp/
• general/
• graphs/
• linkedlists/
• sorting/
• strings/
• trees/