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 <= 109Compiled with clang 11 using the latest C++ 20 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
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