+0  
 
0
2
0
avatar+63 

Find the number of ways of filling in the squares of a 3 \times 3 grid so that:
* Each square contains a 0 or a 1.
* The sum of the numbers in each row and each column is at most 1.

 

An example is shown below.

 
 May 10, 2025

2 Online Users

avatar