Question: Write a function issudoku ( m ) that takes a numerical matrix and returns true if the board is a valid 4 x 4 Sudoku

Write a function issudoku

(

)

that takes a numerical matrix and returns true if the board is a valid

4

4

Sudoku solution and false otherwise. The figure shows an example of a valid board. For a board to be valid, it must satisfy the following conditions: The numbers on the board should only be one of

1, 2, 3, 4 .

A number should not be repeated on a row or column of the board or within any of the four

2

2

sub

-

blocks shown in the figure. Return false if the input matrix is not a

4

4

matrix.

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