IMO Shortlist 1977 problem 1


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Dodao/la: arhiva
April 2, 2012
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Find all functions f : \mathbb{N}\rightarrow \mathbb{N} satisfying following condition:
f(n+1)>f(f(n)) \quad \forall n \in \mathbb{N}
Source: Međunarodna matematička olimpijada, shortlist 1977