find root mean square of a signal x in less time than the test code and accurate to six places.
Project Euler: Problem 1, Multiples of 3 and 5
Find perfect placement of non-rotating dominoes (easier)
Getting the indices from a vector
Find out missing number from a vector of 9 elements
Sum the Digits of a Number
Given an unsigned integer x, find the largest y by rearranging the bits in x
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