Kvant Math Problem 1428

Before I start, I need the full text of Kvant problem M1428.

kvantmathematicsolympiad

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Solve time: 4m20s
Source on kvant.digital

Problem

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

Before I start, I need the full text of Kvant problem M1428. Could you provide the statement in text form? If it contains a figure, describe it carefully so that all relevant information is included.