2018-05-18 11:56:07 +02:00
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## Zadanie
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Napisać algorytm, który dla danego `n ∈ ℕ` znajdzie wszystkie:
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1. elementy odwracalne
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2. dzielniki zera
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3. elementy nilpotentne
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2018-05-18 11:57:23 +02:00
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4. elementy idempotentne
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2018-05-18 11:56:07 +02:00
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w pierścieniu `{ℤ/nℤ, +, ⋅}`.
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### Przykłady:
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* Input:
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> `4`
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* Output:
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> `[[1,3], [0,2], [0,2], [0,1]]`
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* Input:
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> `6`
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* Output:
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> `[[1,5], [0,2,3,4], [0], [0,1,3,4]]`
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