just a simple sum

can someone explain its algorithm in detail?

Er… Which algorithm??

I believe he asked about this : http://www.codechef.com/OCT09/problems/H4/

I think that’s what you are looking for…


People already provided you with links for your problem, and I hope you can solve it :slight_smile:

But please, if you intend to obtain help from the community try to be as descriptive and organized as it is possible to you.

This is because it actually makes a lot easier for people to help you out and both you and the helper can benefit more of your questions :smiley:

Please take this as an advice and not actually a critic :slight_smile: