Add only the even numbers of x
x = [1 2 3 4 5]
the positive numbers are: 2 4, so their sum is 6
Increment a number, given its digits
Rotate a Matrix
find the maximum element of the matrix
Maximum value in a matrix
Let's see how peculiar we can get
Count the numbers
Connect 4 (the boardgame)
How many complete pizzas (number 2)
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