LeetCode --- 1009. Complement of Base 10 Integer 解题报告

Posted 2021-12-17 杨鑫newlfe

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.

• For example, The integer 5 is "101" in binary and its complement is "010" which is the integer 2.

Given an integer n, return its complement.

Example 1:

Input: n = 5
Output: 2
Explanation: 5 is "101" in binary, with complement "010" in binary, which is 2 in base-10.

Example 2:

Input: n = 7
Output: 0
Explanation: 7 is "111" in binary, with complement "000" in binary, which is 0 in base-10.

Example