Problem 45282. Cryptography with A Square Matrix : Decoding
Previous Problem: Cryptography with A Square Matrix : Encoding
Now decode a double vector to a (hopefully!) meaningful text.
Inputs are encoded vector and key matrix.
inverse of key
Reshape encodedVector so it has the same number of rows with key
Multiply inverseKey and reshapedVector, round it and reshape it;
char equivalent of message vector is 'matlab & cody'
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