RU-ALLRUSSIAN 1982 Problem 14
An integer is put in each cell of an array. The difference between the integers in cells which share a side is 0 or 1. Show that some integer occurs at least times.
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.