From A = [5,2,3] and B = [1,2,3,4,5,6,7,8,9,10] produce a vector C where :
C(1) is the sum of the first A(1) elements of B,
C(2) is the sum of the next A(2) elements of B, etc.
c(i) = 0 if A(i) = 0.
out-> [15 13 27];
Get the area codes from a list of phone numbers
Find the sum of the elements in the "second" diagonal
2 b | ~ 2 b
01 - Scalar variables
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
vectorization in N
A quadrant matrix
Create a matrix X, where each column is a shifted copy of the vector v
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