Python one-liner using zfill


  • 0
    W
    def reverseBits(self, n):
        return  int(format(n, 'b').zfill(32)[::-1], 2)
    

    To be honest, it's not the most readable solution. But it's fast.

    What happens is it first formats the int as a binary string representation padded to 32 places (using zfill), then reverses the string and casts it to a base-10 integer. As we know it's unsigned we don't need to worry about edge cases using the signing bit.


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