Mex Segments

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Chef has a permutation $P$ of length $N$ consisting of integers $0$ to $N-1$. Help Chef answer $Q$ queries of the following kind: - Given integers $L_1, L_2, M_1,$ and $M_2$, compute the number of *subsegments* of $P$ having length in the range $[L_1, L_2]$ (both inclusive) and [MEX](https://en.wikipedia.org/wiki/Mex_(mathematics)) in the range $[M_1, M_2]$ (both inclusive). Note: - The permut

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solution.cppC++17

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