create a [n*n] matrix.
mat(4)= [ 1 4 9 16
4 4 9 16
9 9 9 16
16 16 16 16]
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Rotate a Matrix
Find out missing number from a vector of 9 elements
Add a row of zeros on top of a matrix
Find out total non zero element of matrix
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