Given n and s, return a n-by-n matrix a of integers such that
sum(sum(a == rot90(a)))
is equal to exactly s. The integers should be chosen from the set 1 to n.
So for instance, if n is 2, and s is 2, you could return
a = [ 1 1
2 2 ] since rot90(a) matches a in exactly one place.
For any n and s, a is of course not unique. I'm only checking to make sure the conditions are true.
Solution Stats
Problem Comments
5 Comments
Solution Comments
Show comments
Loading...
Problem Recent Solvers14
Suggested Problems
-
Number of 1s in the Binary Representation of a Number
484 Solvers
-
Matrix which contains the values of an other matrix A at the given locations.
240 Solvers
-
85 Solvers
-
Create logical matrix with a specific row and column sums
349 Solvers
-
188 Solvers
More from this Author54
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
In the problem description, you say "The integers should be chosen from the set 1 to n." However, in your example for a 2x2 matrix, you have a 3 as one of the terms. Am I missing something?
function a = match_rot(n)
The problem says given n and s.
However, only n is provided.
Are we allowed to set s?
s=feval(@evalin,'caller','s');
Lack of s input solved
Sorry guys. Sloppy problem creation on my part. Unfortunately my signature change will invalidate all the solutions up to this point, but yes it should be match_rot(n,s)
"since rot90(a) matches a in exactly _two_ places" for the example in the problem statement?