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 Solvers13
Suggested Problems
-
938 Solvers
-
404 Solvers
-
Rosenbrock's Banana Function and its derivatives
163 Solvers
-
How long is the longest prime diagonal?
409 Solvers
-
Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)
900 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?