RU-ALLRUSSIAN 1963 Problem 11
Can we label each vertex of a 45- gon with one of the digits 0, 1, ..., 9 so that for each pair of distinct digits i, j one of the 45 sides has vertices labeled i, j?
Dataset text NuminaMath olympiads. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.