///
///  let input = [0, 1, 2, 3];
///  let expected_output = [3, 2, 1, 0];
///  assert_eq!(&reverse(&input), &expected_output)
///
fn reverse(forward: &[u8]) -> Vec<u8> {
  forward.iter().cloned().rev().collect()
}

fn main () {
    let input = [0, 1, 2, 3];
    let expected_output = [3, 2, 1, 0];
    assert_eq!(&reverse(&input), &expected_output)
}