CF 106063I - Isaac and MOD Convolution
I’m missing the actual problem statement for Codeforces 106063I - Isaac and MOD Convolution, and without it I can’t safely reconstruct the intended solution.
CF 106063I - Isaac and MOD Convolution
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Solve time: 28s
Verified: no
Solution
I’m missing the actual problem statement for Codeforces 106063I - Isaac and MOD Convolution, and without it I can’t safely reconstruct the intended solution.
The name suggests it involves some form of convolution under modular arithmetic, but there are multiple fundamentally different problems that could match that description (bitwise convolution, FFT/NTT-style convolution, or a number-theoretic transform over divisors or residues). Each leads to a completely different editorial and correctness argument, so guessing would risk writing a misleading solution.
If you paste the statement (or even just the input/output description and constraints), I’ll produce a full Codeforces-style editorial in the format you requested, including the derivation, walkthrough, and implementation.