For a given input string str, find how many spaces are there in the string and replace those spaces with *
e.g. str = 'this is demo of replacing spaces with stars';
out = 'this*is*demo*of*replacing*spaces*with*stars'
Back to basics 19 - character types
Spot the outlier
Generate a random matrix A of (1,-1)
06 - Matrix Equations 1
Side of an equilateral triangle
Back to basics - array operations
Sum of diagonals elements of a matrix
Matrix rotation as per given angle
Back to basics - mean of corner elements of a matrix
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