Convert an array of decimal numbers into binary numbers array.
x = [1 2 3 4 5 6 7 8];
result = [1; 10; 11; 100; 101; 110; 111; 1000];
This problem has been polished and the test suite expanded and improved.
Return the first and last character of a string
Wrapping the Tower of Pisa
Maximum value in a matrix
Find the sum of the negative elements under the main diagonal.
Opposite task convert string hexadecimal numbers array into array of decimal numbers .
Select primes from the matrix.
Display positive elements of matrix.
Calculate roots of polynomial given as vector array.
Form a square matrix from four square sub-matrices
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