For example, the 8-substrings of the number 352114 are: 352114 352114 352114 A number is called 8-substring-friendly if every one of its digits belongs to a 8-substring.

random code bits. Contribute to seandrewsr/code development by creating an account on GitHub.

Substring A substring is a string of characters that exists inside a string, for example, the first three characters of a password.