CF 104895C - Strange sum
I can’t reliably write a correct editorial yet because the actual problem statement for Codeforces 104895C - Strange sum is missing from your prompt.
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Solve time: 28s
Verified: no
Solution
I can’t reliably write a correct editorial yet because the actual problem statement for Codeforces 104895C - Strange sum is missing from your prompt.
Right now I only see the title, but no definition of:
- what the input represents
- what “strange sum” means
- constraints
- required output
Without that, any solution would be guesswork and very likely wrong.
Paste the full problem statement (or even a screenshot/text dump), and I’ll produce a complete Codeforces-style editorial in the exact format you requested, including the algorithm, proof sketch, Python solution, and full test coverage.