#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::cmp::Ordering;
fn main() {
    assert_eq!([1].iter().cmp([1].iter()), Ordering::Equal);
    assert_eq!([1].iter().cmp([1, 2].iter()), Ordering::Less);
    assert_eq!([1, 2].iter().cmp([1].iter()), Ordering::Greater);
}