Given two positive integers num1 and num2, find the positive integer x such that:
x has the same number of set bits as num2, andx XOR num1 is minimal.Note that XOR is the bitwise XOR operation.
Return the integer x. The test cases are generated such that x is uniquely determined.
The number of set bits of an integer is the number of 1's in its binary representation.
\n
Example 1:
\n\n\nInput: num1 = 3, num2 = 5\nOutput: 3\nExplanation:\nThe binary representations of num1 and num2 are 0011 and 0101, respectively.\nThe integer 3 has the same number of set bits as num2, and the value 3 XOR 3 = 0 is minimal.\n\n\nExample 2:
\n\n\nInput: num1 = 1, num2 = 12\nOutput: 3\nExplanation:\nThe binary representations of num1 and num2 are 0001 and 1100, respectively.\nThe integer 3 has the same number of set bits as num2, and the value 3 XOR 1 = 2 is minimal.\n\n\n\n
Constraints:
\n\n1 <= num1, num2 <= 109给你两个正整数 num1 和 num2 ，找出满足下述条件的正整数 x ：
x 的置位数和 num2 相同，且x XOR num1 的值 最小注意 XOR 是按位异或运算。
返回整数 x 。题目保证，对于生成的测试用例， x 是 唯一确定 的。
整数的 置位数 是其二进制表示中 1 的数目。
\n\n
示例 1：
\n\n\n输入：num1 = 3, num2 = 5\n输出：3\n解释：\nnum1 和 num2 的二进制表示分别是 0011 和 0101 。\n整数 3 的置位数与 num2 相同，且 3 XOR 3 = 0 是最小的。\n\n\n示例 2：
\n\n\n输入：num1 = 1, num2 = 12\n输出：3\n解释：\nnum1 和 num2 的二进制表示分别是 0001 和 1100 。\n整数 3 的置位数与 num2 相同，且 3 XOR 1 = 2 是最小的。\n\n\n\n\n
提示：
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