Given n, find the sum of the digits that make up 2^n.
Input n = 7
Output b = 11
since 2^7 = 128, and 1 + 2 + 8 = 11.
Given an unsigned integer x, find the largest y by rearranging the bits in x
Right and wrong
Basic arrays operations.
Compare two input matrices
The 5th Root
Implement a ROT13 cipher
Select every other element of a vector
Sums with Excluded Digits
Remove all the consonants
Find common elements in matrix rows
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