Cannot understand the editorial (INVZCNT)

can someone explain me in easy way , how they are solving this problem.

I had previously written an unofficial editorial for the same at INVZCNT Unofficial editorial

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I think it’s better to point out the part you are not understanding rather than saying it’s not understandable


thanks bro, now i fully understood.

sorry sir, actually first time doing xor problem thats why i confused, but now understood,
nice editorial thanks.

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