CF 105629G - 回文串

I don’t have the actual statement for Codeforces 105629G “回文串” in the prompt, and without it I can’t reliably reconstruct the intended problem.

codeforcescompetitive-programming

CF 105629G - \u56de\u6587\u4e32

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Solve time: 31s
Verified: no

Solution

I don’t have the actual statement for Codeforces 105629G “回文串” in the prompt, and without it I can’t reliably reconstruct the intended problem. There are several standard “palindrome string” variants (counting palindromic substrings, checking transformability, minimal edits, palindromic automaton queries, etc.), and the optimal solution changes completely depending on which one this is.

If you paste the full statement (or even just the input/output description and constraints), I can write the complete editorial in the exact style you requested, including a full derivation, algorithm walkthrough, and code.