This problem is related to the 17x17 challenge. See also Part 1 of this problem. Given a matrix in which each element is either 1, 2, 3, or 4, determine whether or not any rectangles are present. A rectangle is a formed whenever four instances of the same value appear in the corners of a rectangular region of the matrix.
Examples:
Input a = [ 4 1 2 4 1
3 3 2 1 4
3 2 4 1 1
1 4 3 2 2
1 1 1 4 4 ]
Output tf is false
You can't form any rectangles here.
Input a = [ 1 4 3 1
3 1 4 1
1 3 4 1
1 1 2 3 ]
Output tf is true
There is a rectangle: a([1 3],[1 4]) is [1 1; 1 1]
Solution Stats
Problem Comments
1 Comment
Solution Comments
Show comments
Loading...
Problem Recent Solvers141
Suggested Problems
-
Find the sum of all the numbers of the input vector
54797 Solvers
-
2530 Solvers
-
Create a matrix X, where each column is a shifted copy of the vector v
226 Solvers
-
854 Solvers
-
Natural numbers in string form
1942 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!
it was a good problem.
Here is my m File Solution : http://up-4.net/d/tt7S