Thursday, 12 September 2013

How to find n+n/2+n/3+.....+n/n in C efficiently?

How to find n+n/2+n/3+.....+n/n in C efficiently?

how to find sum n+n/2+n/3+....+n/n in C efficiently???
I need an algorithm better than O(n).
Can we calculate it better than ?
Any help is appreciated.

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