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IMO Longlists
1977 IMO Longlists
39
39
Part of
1977 IMO Longlists
Problems
(1)
Exists a lattice centroid point among 37 points [ILL 1977]
Source:
1/11/2011
Consider
37
37
37
distinct points in space, all with integer coordinates. Prove that we may find among them three distinct points such that their barycentre has integers coordinates.
combinatorics proposed
combinatorics