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An algorithm is a sequence of well-defined steps that defines an abstract solution to a problem. Use this tag when your issue is related to design and analysis of algorithms.

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Restore the original array after merge Sort based on it's steps

i'm trying to write an algorithm to reconstruct the original array from the sorted one. considering input value is a string of 1s and 2s which 1 means in merging part of merge sort, element from left …
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