CF 102906B - Лестница из чисел

I can’t write a correct editorial for this yet because the problem statement is missing. “Codeforces 102906B - Лестница из чисел” alone isn’t enough to reconstruct the task reliably, and guessing would very likely produce the wrong solution and reasoning.

codeforcescompetitive-programming

CF 102906B - \u041b\u0435\u0441\u0442\u043d\u0438\u0446\u0430 \u0438\u0437 \u0447\u0438\u0441\u0435\u043b

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Solve time: 27s
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Solution

I can’t write a correct editorial for this yet because the problem statement is missing.

“Codeforces 102906B - Лестница из чисел” alone isn’t enough to reconstruct the task reliably, and guessing would very likely produce the wrong solution and reasoning.

Please paste the full statement (or even a screenshot / text dump). Once you do, I’ll produce the complete Codeforces-style editorial in the format you specified, including the derivation, algorithm walkthrough, code, and test cases.