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After a good night sleep I was filled with creativity... blablabla :)

The solution: First make a new matrix that is copy of the matrix in the parameter and a matrix that will be the correct...

Given this 3X3 array:
A B C
B C B
C A C




That matrix is not allowed as input since 'C' occurs two times in the third column.

Condition of the original matrix:
any element can only occur once in column:
A B
A B

is not allowed

but
A B
B A

Hello fellow Java programmers,

I need a function that filters certain elements from a String matrix and returns a new string matrix. The new matrix is 1 row shorter because I want to filter every...