OME 1993 Problem 1
There is a reunion of people from different countries. It is known that in each group of people, at least two have the same age. Show that there must be at least people with the same country, age and sex.
Dataset text AI-MO AoPS. 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.
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