Two arrays $A[1..n]$ and $B[1..n]$ of $($unique$)$ integers are order$-$isomorphic $-$ if and only if for every i$,$ j$,$ A$[$i$]$ A$[$j$]$ implies B$[$i$]$ B$[$j$].$ For example, $14253$ and $27395$ are order isomorphic. However, $14758$ and $26937$ are not because $i=2$ and $j=4$ would lead to pair $4<mn\; id="EditorElement\_1107832">5</mn>$ in the first array while this would be $6>3$ in the second one. Given two such arrays A and B$,$ give an algorithm to determine whether they are order$-$isomorphic or not.