Find the number of 1s in the given binary string.
Example. If the input string is '1100101', the output is 4. If the input string is '0000', the output is 0
Which doors are open?
Given an unsigned integer x, find the largest y by rearranging the bits in x
inner product of two vectors
Back to basics 26 - Keywords
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Sum of first n terms of a harmonic progression
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