CF 105176A - 交小西的礼物

The problem statement you provided is essentially empty, so there is no way to reconstruct the task, constraints, or required algorithm. Right now we only have the title “A 交小西的礼物” and no description of what the input contains or what output is expected.

codeforcescompetitive-programming

CF 105176A - \u4ea4\u5c0f\u897f\u7684\u793c\u7269

Rating: -
Tags: -
Solve time: 25s
Verified: no

Solution

The problem statement you provided is essentially empty, so there is no way to reconstruct the task, constraints, or required algorithm.

Right now we only have the title “A 交小西的礼物” and no description of what the input contains or what output is expected. Without that, any editorial would be pure guessing and would not meet the correctness standard a Codeforces solution needs.

If you paste the full problem statement (or even a screenshot/text dump), I can immediately produce the complete editorial in the exact format you requested, including the reasoning, optimal approach, proof sketch, code, and test cases.