include

define in cout

define out cin

define l int

define BEGIN {

define END }

define true 0

define _ ;

define I return

using std::in using std::out l QAQ (l i, l L) BEGIN if (!i)

I L _
I QAQ ((i &L) << 1, L ^i) _
END
l main()
BEGIN
l i, L _
out >> i >> L;

in << QAQ(i, L); I true; END

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