MathDB

10.8

Part of 2002 All-Russian Olympiad Regional Round

Problems(1)

coloring 10*10 square board

Source: all russian mathematical olympiad 2002 (4th round)

8/21/2011
what maximal number of colors can we use in order to color squares of 10 *10 square board so that each row or column contains squares of at most 5 different colors?
combinatorics unsolvedcombinatorics