#include

#include

#include

char $*$helper$($char $*$str$,$ int left, int right$)\{$

int len $=$ right $-$ left $+1$;

if $($len $==0)//$ base case #$1$

return $""$;

if $($len $==1)\{//$ base case #$2$

char $*$rv $=($char $*)$malloc$(2)$;

strncpy$($rv$,$ str $+$ left, $1)$;

return rv;

$\}$

$//$ recurisve step!

char $*$first $=$ helper$($str$,$ left, left $+$ len $/2-1)$;

char $*$second $=$ helper$($str$,$ left $+$ len $/2,$ right$)$;

char $*$rv $=($char $*)$malloc$($len$+1)$;

strcpy$($rv$,$ second$)$;

strcat$($rv$,$ first$)$;

return rv;

$\}$

char $*$unknown$\_$operation$($char $*$str$)\{$

int len $=$ strlen$($str$)$;

return helper$($str$,0,$ len $-1)$;

$\}$

int main$($void$)\{$

char $*$out $=$ unknown$\_$operation$("$what does this function do$?!!")$;

printf$("\%$s

$",$ out$)$;

return $0$;

$\}$