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arkanoid.livejournal.com - ÐÑ ÑÑо оÑевилнÑй меÑод к коÑÐ
igorbor.livejournal.com - ÐÑÑÑ, конеÑно
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Date: 2002-04-04 04:46 am (UTC)no subject
Date: 2002-04-04 04:56 am (UTC)no subject
Date: 2002-04-04 05:05 am (UTC)no subject
no subject
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Date: 2002-04-04 05:42 am (UTC)no subject
Date: 2002-04-04 05:48 am (UTC)no subject
Date: 2002-04-04 05:52 am (UTC)åùå â âîçäóõå îùóòèìî ïàõíåò ðåêóðñèåé.
áëèí, ãäå âñå îòëè÷íèêè ïî ìàòåìàòèêå è âñÿêèì òàì ìûøëåíèÿì?!
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Date: 2002-04-04 06:25 am (UTC)íèêàêîé ðåêóðñèè :-Ð
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Date: 2002-04-04 06:34 am (UTC)no subject
Date: 2002-04-04 06:36 am (UTC)p2(k)= k+1 if k (0,9)
= 19-k if k (10,18)
êîëè÷åñòâî äâóçíà÷íûõ ÷èñåë ñ ñóììîé öèôð k
p3(k)= sum p2(k-i) if k(0,18)
(0<=i<=9)
= sum
(k-18<=i<=9) p2(k-i) if k(19,27)
êîëè÷åñòâî òðåõçíà÷íûõ ÷èñåë ñ ñóììîé öèôð k
gluk= sum p3(i)*p3(i)
(0<=i<=27)
ìîãëà, ïðàâäà, è íàïóòàòü....
äîëæíî ïðîùå ðåøàòüñÿ
no subject
Date: 2002-04-04 07:00 am (UTC)È âñå ðàâíî íåïîíÿòíî, êàê ;)
ôîðìóëó ïîñìîòðè â êíèæêå.
no subject
Date: 2002-04-04 07:07 am (UTC)no subject
Date: 2002-04-04 08:22 am (UTC)Î÷åâèäíî, ÷òî åñëè â ñ÷àñòëèâûõ áèëåòàõ ïîìåíÿòü âòîðóþ è ïÿòóþ öèôðó, òî ïîëó÷èâøååñÿ ÷èñëî áóäåò äåëèòüñÿ íà 11.
×èñåë, êîòîðûå äåëÿòñÿ íà 11 âñåãî 999999/11+1=90910.
Òóò, ïðàâäà, íåïîíÿòíî, êàê èñêëþ÷èòü áèëåòû, ñóììà öèôð â îäíîé èç ãðóïï íà 11 èëè 22 áîëüøå, ÷åì â äðóãîé (òèïà 000778), íî ýòî, êàæåòñÿ, óæå ïðîùå.
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Date: 2002-04-05 02:40 am (UTC)no subject
Date: 2002-08-01 08:56 pm (UTC)1. ÐÐ»Ñ ÐºÐ°Ð¶Ð´Ð¾Ð³Ð¾ ÑиÑла Ð¾Ñ 0 до 27 ÑÑиÑаем колиÑеÑÑво ÑпоÑобов, коÑоÑÑм оно Ð¼Ð¾Ð¶ÐµÑ Ð±ÑÑÑ Ð¿Ð¾Ð»ÑÑено
(в каÑеÑÑве ÑпоÑоба пÑедлагаеÑÑÑ ÑÑи вложеннÑÑ Ñикла Ð¾Ñ 0 до 9, маÑÑив ÑазмеÑом 27 и внÑÑÑи опеÑаÑоÑ
arr[i+j+k] = arr [i+j+k] + 1
2. ÐоÑле Ñого, как маÑÑив заполнен, каждÑй его Ñлен возводиÑÑÑ Ð² квадÑаÑ
3. СÑиÑаеÑÑÑ ÑÑмма квадÑаÑов.
4. ÐолÑÑаеÑÑÑ 55252
ÐÑоделаÑÑ ÑÑо в Ñме вполне ÑеалÑно. Ðа бÑмаге - еÑе ÑеалÑнее. ХоÑÑ Ð¸ не Ñо ÑÑÐ¾Ð±Ñ Ð¿ÑоÑÑо, конеÑно.
ÐÑ ÑÑо оÑевилнÑй меÑод к коÑÐ
Date: 2002-08-02 05:17 am (UTC)ÐÑÑÑ, конеÑно
Date: 2002-08-02 05:25 am (UTC)no subject
Date: 2002-08-21 05:41 am (UTC)Но к сожалению не помню ничего оттуда.
А там был какой-то несложный способ.