Kvant Math Problem 353

Before proceeding, I need the precise textual statement of Kvant problem M353.

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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.

Before proceeding, I need the precise textual statement of Kvant problem M353. Could you provide the full problem text? The graphical version alone is insufficient for a rigorous, step-by-step solution.