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Groups > comp.lang.c++ > #11194

Re: Big O

From Willem <willem@toad.stack.nl>
Newsgroups comp.lang.c, comp.lang.c++
Subject Re: Big O
Date 2011-11-02 11:16 +0000
Organization Stack Usenet News Service
Message-ID <slrnjb29l1.3020.willem@toad.stack.nl> (permalink)
References <j8r6fg$ih7$1@dont-email.me>

Cross-posted to 2 groups.

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Gen wrote:
) I have program where the other loop runs 'n' times.
) When i is 0 in the outer loop, the inner loop runs n times
) When i is 1 in the outer loop, the inner loop runs n/2 times
) When i is 2 in the other loop, the inner loop runs n/3 times.
)
) i.e. The inner loop runs n/(i+1) times.
)
) If I had express the complexity of this program in Big O notation,
) what would it be?
)
) I am thinking it will be O(nlogn) - but I am not sure how to justify it 
) because it's not exactly a binary algorithm.
)
) Can someone help me analyze this?

Google for "Euler's gamma", and/or "Harmonic number".


SaSW, Willem
-- 
Disclaimer: I am in no way responsible for any of the statements
            made in the above text. For all I know I might be
            drugged or something..
            No I'm not paranoid. You all think I'm paranoid, don't you !
#EOT

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Thread

Big O Gen <g@g.com> - 2011-11-02 16:06 +0530
  Re: Big O "BartC" <bc@freeuk.com> - 2011-11-02 10:56 +0000
    Re: Big O Willem <willem@toad.stack.nl> - 2011-11-02 11:26 +0000
      Re: Big O "BartC" <bc@freeuk.com> - 2011-11-02 11:39 +0000
      Re: Big O "Scott Fluhrer" <sfluhrer@ix.netcom.com> - 2011-11-02 10:28 -0400
        Re: Big O gwowen <gwowen@gmail.com> - 2011-11-02 09:08 -0700
  Re: Big O gwowen <gwowen@gmail.com> - 2011-11-02 04:15 -0700
  Re: Big O Willem <willem@toad.stack.nl> - 2011-11-02 11:16 +0000
  Re: Big O Gen <g@g.com> - 2011-11-02 18:43 +0530

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