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feat(Archive/Imo): formalize IMO 1982q1
Formalized question 1 of the 1982 IMO.
Made a mistake with my original PR as I made a branch from Imo1982Q3, this should be fixed now.
Fixed the domain of the function to be the positive naturals according to @vihdzp comments - took less effort than expected.
Please let me know if I have made a mistake or if there are any further comments or improvements.