The complement of an integer is the integer you get when you flip all the 0's to 1's and all the 1's to 0's in its binary representation.
5 is "101" in binary and its complement is "010" which is the integer 2.Given an integer n, return its complement.
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Example 1:
\n\n\nInput: n = 5\nOutput: 2\nExplanation: 5 is "101" in binary, with complement "010" in binary, which is 2 in base-10.\n\n\n
Example 2:
\n\n\nInput: n = 7\nOutput: 0\nExplanation: 7 is "111" in binary, with complement "000" in binary, which is 0 in base-10.\n\n\n
Example 3:
\n\n\nInput: n = 10\nOutput: 5\nExplanation: 10 is "1010" in binary, with complement "0101" in binary, which is 5 in base-10.\n\n\n
\n
Constraints:
\n\n0 <= n < 109\n
Note: This question is the same as 476: https://leetcode.com/problems/number-complement/
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