A number is called 8-substring-friendly if every one of its digits belongs to a 8-substring. For example, 352114 is 8-substring-friendly, but 26(5)44 is not. For a given n, find T(n) the number of ...
In python, a String is a sequence of characters that may contain special characters or alphanumeric characters, for example, "we meet on Friday at 08:00 am". It is possible to access sub-parts of the ...
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