printf$("$Beginning of the code"$)$;

$2.$ int a $=0,$ n;

$3.$ for$($int i $=0$; i $<$ n; i$++)\{$

$4.$ printf$("\%$d$",$ i$)$;

$5.$ for$($ int j $=$ n; j $>$ i; j$--)\{$

$6.$ a $=$ a $+$ i $+$ j;$)$

$7.$ printf$("\%$d$",$ a$)$;$\}$

$8.$ printf$("$End of the code"$)$;

compute time complexity line by line