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How to swap 3 numbers without using 4th variable?

Answer Posted / ilana

The target is a<-b b<-c c<- a
------------------------------------
a = a+b+c ; // a+b+c b c
c = c+b; // a+b+c b b+c
b = c-b; // a+b+c c b+c
c = a-c; // a+b+c c a
a = a-(b+c) // b c a

Is This Answer Correct ?    12 Yes 7 No



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