fn bbq_skewers(skewers: &'static [&str]) -> (usize, usize) {
    let mut vegetarian = 0;

    for skewer in skewers {
        if ! skewer.contains('x') {
            vegetarian += 1;
        }
    }

    return (vegetarian, skewers.len() - vegetarian);
}

#[test]
fn test1() {
    assert_eq!(
        bbq_skewers(&[
            "--xo--x--ox--",
            "--xx--x--xx--",
            "--oo--o--oo--",
            "--xx--x--ox--",
            "--xx--x--ox--"
        ]),
        (1, 4)
    );
}

#[test]
fn test2() {
    assert_eq!(
        bbq_skewers(&[
            "--oooo-ooo---",
            "--xx--x--xx--",
            "--o---o--oo--",
            "--xx--x--ox--",
            "--xx--x--ox--"
        ]),
        (2, 3)
    );
}

#[test]
fn test3() {
    assert_eq!(
        bbq_skewers(&[
            "--oooo-ooo--",
            "--xxxxxxxx--",
            "--o---",
            "-o-----o---x--",
            "--o---o-----"
        ]),
        (3, 2)
    );
}

fn main() {
    println!("Run `cargo test`.");
}