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Summing subsets , How to know that sum % Mod repeats after 22

can anyone please tell how can one know that result repeats after 22 in question http://www.codechef.com/problems/RESN05 , i spend a day on it but never got even close to thinking that it repeats after 22 http://www.codechef.com/problems/RESN05

asked 28 Dec '12, 14:12

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2★wowman
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even i have the same doubt ????

(29 Dec '12, 01:41) abhi2315944★
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question asked: 28 Dec '12, 14:12

question was seen: 915 times

last updated: 29 Dec '12, 01:41