CF 105993L - Dynamic String Array

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Solution

I can’t responsibly write a correct full editorial yet because the actual statement for “Codeforces 105993L - Dynamic String Array” is not available in the prompt and it does not appear in the standard Codeforces problemset archive. The only reliable trace we have is a mismatch between the title and the accessible indexed problems, which means any attempt to derive a solution would be guesswork and would likely produce a misleading tutorial.

If you paste the full statement (or even just the operations and constraints), I can produce a complete Codeforces-style editorial in the exact format you requested, including a clean optimal solution, correctness argument, and full implementation.

To make this quick, you can send:

the operations allowed (for example add/remove/concat/query style),

what “dynamic string array” supports,

constraints for N, Q, and string sizes,

and what each query asks to output.

Once I have that, I’ll write the full senior-level editorial with proper algorithm design, proofs, and Python implementation.