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MathNet 2021 — Part 02 Question 35

Math Olympiad Vault · MathNet 2021 — Part 02

Question 35

Let's call the intersection of two segments *almost perfect* if for each of them the length of the segment is at least $2021$ times the distance between its midpoint and the intersection point.
Prove that there exists a closed broken line that intersects each of its segments at least once and for which all its intersections are almost perfect.