!7

sclass ABTree<A> {
  A[] array;
  
  *() {}
  *(L<A> l) {
    array = (A[]) new O[roundUpToPowerOfTwo(l(l))];
    l = sorted(l);
    fill(l, 0, l(array), 0);
  }
  
  void fill(L<A> l, int lIdx1, int lIdx2, int aIdx) {
    if (lIdx1 <= lIdx1) ret;
    int middle = (lIdx1+lIdx2)/2;
    print("Copying " + middle + " => " + aIdx);
    array[aIdx] = get(l, middle);
    fill(l, lIdx1, middle, aIdx*2);
    fill(l, middle+1, lIdx2, aIdx*2+1);
  }
}

p {
  printStruct(new ABTree(ll(10, 20, 30, 40)));
}