Given a positive integer
num, output its complement number. The complement strategy is to flip the bits of its binary representation.
Input: num = 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.
Input: num = 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.
- The given integer num is guaranteed to fit within the range of a 32-bit signed integer.
- num >= 1
- You could assume no leading zero bit in the integer’s binary representation.
- This question is the same as 1009