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Find a subset (Posted on 2005-08-24) Difficulty: 3 of 5
Given N integers a1, a2, ... aN prove there exists a (non empty) subset whose sum is a multiple of N. (Allow repeated numbers in both the original set and its subsets.)

See The Solution Submitted by Federico Kereki    
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  Subject Author Date
Some ThoughtsA particular caseOld Original Oskar!2005-09-01 16:24:59
re: SolutionTristan2005-08-26 09:22:15
SolutionSolutionTan Kiat Chuan2005-08-26 04:20:11
Some ThoughtsNo SubjectJosh706792005-08-24 22:19:51
Some Thoughtsre: what is a subset?Old Original Oskar!2005-08-24 19:09:05
Questionwhat is a subset?Percy2005-08-24 18:30:13
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