Viewing insights from Codeforces 1860A: Not a Substring that are similar (thus shared) with only this insight from Codeforces 913G: Power Substring: Obviously, yes, you can choose the substring to occur at the start and then fill in the rest of the digits in any way. by Solarion
- Try to construct two strings with a small overlap, then the given string cannot be a substring of both. by Solarion
- What are the extreme strings of length 2n? (most opposite) by Solarion
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