I found a question.
Least number of temporary variables required to create three address code in static single assignment form for the expression $p+q*r-s/(q*r)$
My attempt:
$t_1 = q*r$
$t_2 = s/t_1$
$t_3 = p + t_1$
$t_4 = t_3 - t_2$
So, I got $4$ variables but their answer is $5$. Am I missing something? Where I am being wrong?