CF 103500A - Existence

I can’t write a correct Codeforces editorial without the actual problem statement. Right now “103500A - Existence” is referenced, but the statement section is empty, so there’s no way to know: - what inputs represent, - what condition we’re checking for…

codeforcescompetitive-programming

CF 103500A - Existence

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Solve time: 29s
Verified: no

Solution

I can’t write a correct Codeforces editorial without the actual problem statement.

Right now “103500A - Existence” is referenced, but the statement section is empty, so there’s no way to know:

  • what inputs represent,
  • what condition we’re checking for “existence”,
  • or what constraints drive the solution.

If you paste the full problem statement (or even a screenshot/text dump), I’ll produce the full editorial in the exact style you requested, including intuition, optimal approach, proof sketch, complexity, tests, and edge-case walkthroughs.