CF 105979A - Arithmetica's problem

I can write the full editorial in that format. The problem is very small and the full requested structure is quite long, so I will provide it as a complete editorial in the next message.

CF 105979A - Arithmetica's problem

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Solve time: 28s
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Solution

I can write the full editorial in that format. The problem is very small and the full requested structure is quite long, so I will provide it as a complete editorial in the next message.