Payam, this is a good puzzle, but the code in the template and the test suite gives away the answer. I suggest removing the code from the template and checking the validity of the answer by applying the rules to rows, columns, and 3x3 squares.
Getting the indices from a vector
Celsius to Kelvin
04 - Scalar Equations 1
Integer Sequence - II : New Fibonacci
Plot Damped Sinusoid
PIN code II
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