Static Code Analysis $6$

What is the output of the following code?

INTEGER $a=10,b=25,c=15$

INTEGER res $=0$

while $)>(0\{$

res $+=(a\%c)+(c\%a)$

b $-=a\%c$

swap$(a,c)$

$\}$

PRINT res

Pick ONE option

$45$

$35$

$20$

$30$