Given a n-bits number x, what is the sum of x to the binary inverted version of x? (this might be more simple than you think :-) )
n = 8
x = 1 (00000001)
n-bit binary inverted x = 254 (11111110)
then y = 255
First non-zero element in each column
Getting logical indexes
Is it an Armstrong number?
Reduce the logic
Odd times even numbers in a matrix
How many complete pizzas (number 2)
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