Assume the following declarations have been made:

#define MAX $50$

int a$[$ MAX $],$ i$,$ j$,$ temp;

What is the effect of this program segment?

for $($i $=0$; i $<$ MAX $/2$; $++$i$)\{$

temp $=$ a$[$i$]$;

a$[$i$]=$ a$[$MAX $-$ i $-1]$;

a$[$MAX $-$ i $-1]=$ temp;

$\}$