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Burrows–Wheeler transform: Difference between revisions
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Using the STX/ETX control codes to mark the start and end of the text, and using s[i:] + s[:i] to construct the ith rotation of s, the forward transform takes the last character of each of the sorted rows.
The inverse transform repeatedly inserts r as the left column of the table and sorts the table. After the whole table is built, it returns the row that ends with ETX, minus the STX and ETX.
Ref: [https://www.codespeedy.com/burrows-wheeler-transform-in-python/ Burrows Wheeler Transform in Python]
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