RU-ALLRUSSIAN 1981 Problem 11
Is it possible to color half the cells in a rectangular array white and half black so that in each row and column more than 3/4 of the cells are the same color?
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.