Question: A dec-string is a sequence of characters from the 10-character alphabet {0,1, 2, 3, 4, 5, 6, 7, 8,9}. A dec-string di, ..., d, is

A dec-string is a sequence of characters from the 10-character alphabet

{0,1, 2, 3, 4, 5, 6, 7, 8,9}. A dec-string di, ...,

A dec-string is a sequence of characters from the 10-character alphabet {0,1, 2, 3, 4, 5, 6, 7, 8,9}. A dec-string di, ..., d, is k-bad if d; = d; or d; + d; = 9 for some i

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