9x9 board
Source: IZO 1 Junior Problem 1
December 16, 2008
combinatorics proposedcombinatorics
Problem Statement
The 40 unit squares of the 9 9-table (see below) are labeled. The horizontal or vertical row of 9 unit squares is good if it has more labeled unit squares than unlabeled ones. How many good (horizontal and vertical) rows totally could have the table?