The forgotten array

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**This is a code golfing question.** Neel was working on his research project on an array. Unfortunately, he scrambled the index of different elements of the list. But when he studied the algorithm, he got to know that the program has given him $2$ arrays as output $A$ and $B$ where $B_{i}$ represents the initial index of $A_{i}$. Neel wants your help but because of memory constraints, he wants

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solution.cppC++17

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