Question 17

class ReadCode{
    public static void main (String[] args){
        int[]listA={8,7,6,5};
        int[]listB={4,3,2,1};
        int max=listA.length;
        if(listA.length>listB.length){
            max=listB.length-1;
        }
    recurse(listA, listB, max);

    for(int i=0; i<listA.length; i++){
        System.out.print(listA[i]+".");
        System.out.print(listB[i]+".");
    }
}

static void recurse(int[] list1, int[] list2, int elem){
    if(elem<=0){
        return;
    }
    else{
        recurse(list1, list2, elem-1);
        list2[0]=list2[list2.length-1];
        list2[list2.length-1]=list1[0];
        list1[0]+= elem;
        }
    }
}