Maximizing XOR Discussions | Algorithms | HackerRank
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  2. Algorithms
  3. Bit Manipulation
  4. Maximizing XOR
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Maximizing XOR

  • antitau
     + 1 comment

    c++, same complexity, but probably faster on newer processors, although not directly portable:

    #include <climits>
int maxXor(int a, int b) {
  if(a^=b)
    return ~INT_MIN>>__builtin_clz(a)-1;
  return 0;
}