Magic$($a$1,...,$ an; b$1,...,$ bn$)\backslash \backslash$ input is $2$ lists of n integers, n is a power of $2$if $($n $=1)$return abi$04050607080910$else $=2$rv $=$ Magic$($a$1,...,$ ap$,$ b$1,...,$ bp$)$rv $=$ rv $+$ Magic$($a$1,...,$ Ap$,$ bp$+1,...,$ bn$)$rv $=$ rv $+$ Magic$($ap$+1,...,$ an$,$ bp$+1,...,$ bn$)$rv $=$ rv $+$ Magic$($ap$+1,..,$ an$,$ b$1,...,$ bp$)$return rvThe number of leaves in Magic's recursion tree is O$($X$)$ where X is $...$