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Rodion,
I have sent another potential new problem to your e-mail account.
There is no hurry to deal with it.
Clive
Clive, thank you very much!
And it seems to be of that kind of "magical" arithmetic sequences of operations which fascinated me from childhood and in which I was nevertheless always poor :) Going to try it now...
sincerely yours, Rodion
Well, seems I have it done, but I really feel miserable :)
First of all I haven't come up with precise proof of my approach (which probably is correct, just need to be
proved). Secondly, I probably spent 40 minutes on fixing my factors counting loop. I guess this task should
be added to chain of simple
ones, a kind of fine "advanced simple" really :)