Problem in understanding Magic Formulas(424C)

Правка en1, от hrushikesht, 2017-05-27 12:32:16

Hi,

I just read the editorial of Magic Formulas. I couldn't understand a particular formula in editorial.

In editorial it is written that,

.

But in question, the formula is given as,

.

I am not able to understand how these formulas are equivalent. Please help me understanding what I am missing here.

Теги doubts, xor, div2c

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en2 Английский hrushikesht 2017-05-29 10:27:15 9
en1 Английский hrushikesht 2017-05-27 12:32:16 674 Initial revision (published)