Sereja and Equality

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Sereja call two arrays A and B with length n almost equal if for every i (1 . CX[x] equal to number of index j (1 such that X[j] . For two permutations P1 and P2 Sereja found new function F(P1, P2) that is equal to number of pairs (l,r) (1 such that P1[l..r] is almost equal to P2[l..r] and array P1[l..r] contain not more then E inversions. Now Sereja is insterested in next question: what is th

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solution.cppC++17

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