Kvant Math Problem 1316

I can prepare the full six-section solution, but I need the text of Kvant problem M1316.

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Problem

The textual version of the problem statement is being prepared. The graphical version can be found in the published issue.

I can prepare the full six-section solution, but I need the text of Kvant problem M1316. Could you provide the problem statement or a description of the problem? Once I have it, I can generate a rigorous, textbook-style solution following your requested format.