Split And Differ

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You are given an array $A$ of length $N$. Find any array $B$ of length **at most** $3N$, containing **positive** integers, such that the following conditions hold: - No two adjacent elements of $B$ are equal, and - It is possible to partition $B$ into exactly $N$ non-empty contiguous subarrays such that the sum of the elements in the $i$-th part is equal to $A_i$. Formally, you need to find an

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solution.cppC++17

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