476. Number Complement

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Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation.

Note:

• The given integer is guaranteed to fit within the range of a 32-bit signed integer.
• You could assume no leading zero bit in the integer’s binary representation.

Example 1:

Input: 5
Output: 2
Explanation: The binary representation of 5 is 101 (no leading zero bits), and its complement is 010. So you need to output 2.

Example 2:

Input: 1
Output: 0
Explanation: The binary representation of 1 is 1 (no leading zero bits), and its complement is 0. So you need to output 0.

class Solution:    def findComplement(self, num):        """        :type num: int        :rtype: int        """        res = []        for i in bin(num).split(‘b‘)[-1]:            if i==‘0‘:                res.append(‘1‘)            else:                res.append(‘0‘)        return int(‘‘.join(res),2)

476. Number Complement