CF 102942D - XOR Game
I don’t have the actual statement of Codeforces 102942D - XOR Game in your prompt, and that problem ID doesn’t correspond to a standard indexed CF problem I can reliably reconstruct.
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Solve time: 27s
Verified: no
Solution
I don’t have the actual statement of Codeforces 102942D - XOR Game in your prompt, and that problem ID doesn’t correspond to a standard indexed CF problem I can reliably reconstruct.
Since the editorial has to be fully correct (especially for XOR games, where small rule differences completely change the solution), I need at least one of the following:
- the full problem statement, or
- a short description of the rules and objective (game rules, moves, win condition), or
- input/output + constraints section
Once you paste that, I’ll write the full senior-level editorial in the exact format you specified.