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 22 - Rotate a matrix
Multiply a column by a row
Find the position of first minimum value in an integer array with numbers
Divide by 4
Who is the baby and who is the daddy in this family?
Tax Season ! How much is my salary?
Matrix multiplication across rows
Sum of diagonals elements of a matrix
Matrix to column conversion
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