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How to calculate the time complexity of an algorithem from the scratch?

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  1. HI frdz, can any one tel me to find out da complexity of a given algorithms. I dont know about notations. when im reading notations im not getting anything,totally confusing. Hope i can get help!
  2.  
Dec 29 '10 #1
1 2272
jkmyoung
2,057 Expert 2GB
There's an art to it which is somewhat hard to explain in just form posts. You really have to look at which variables are controlling the flow of your code. Most Time complexity analysis involved looking at loops and seeing how the variables change each time the code loop is run.
  1. Find the looping or if/else conditions for each section of the code.
  2. Isolate the variables in these conditions that control code flow
  3. Examine how these variables change within the loop.

I would recommend reading a book on Big O notation and time analysis. There is a lot of stuff out on the web as well: eg http://en.wikipedia.org/wiki/Big_O_notation
Mar 28 '11 #2

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