Good refresher course on 'O(N)' type stuff? [duplicate]

Question

Learned all about computing algorithm costs in College, but that was so long ago I forgot it all. Is there any sort of walkthrough that goes over the whole subject matter? I feel as though there was more than I currently remember. I want to refresh some of my core skills.

Answer 1

Check out Big-O for Eight Year Olds?

Answer 2

You should be able to find various tutorials by searching for complexity analysis.

Wikipedia (Analysis of algorithms) is always a good place to get a quick refresher.