Alice and the Array

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Alice is playing a game with permutations of size $N$. - She selects a random *permutation* $P$ of size $N$ and a random index $i$ $(1\le i \le N)$; - She keeps incrementing the index $i$ **until**: - The next element is greater than the current element $(P_{(i+1)} > P_i)$, or; - She reaches the last index $(i = N)$. Find the [expected](https://en.wikipedia.org/wiki/Expected_value) nu

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solution.cppC++17

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