Count Inversions

Count Inversions

Elementary+
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In informatica ed in matematica discreta, un'inversione è una coppia di posti un una sequenza occupati da elementi che non sono nel loro ordine naturale. Dunque, se consideriamo l'ordine ascendente per un gruppo di numeri, un'inversione avviene quando un numero più grande compare prima di uno più piccolo nella sequenza.

Osserva questa sequenza d'esempio: (1, 2, 5, 3, 4, 7, 6). Possiamo vedere che ci sono tre inversioni:
- 5 e 3; - 5 e 4; - 7 e 6.

Ti viene data una sequenza di numeri unici e devi contare il numero di inversioni in essa. ...

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