http://mihhon.livejournal.com/ ([identity profile] mihhon.livejournal.com) wrote in [personal profile] green_fr 2007-08-18 11:41 pm (UTC)

хохо, дошло, я нашёл аналитическое решение - эти хвосты - суммы бесконечных геометрических прогрессий => далее тривиально :)

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