#[cfg(test)]
mod examples {
    use day49::is_legitimate;

    #[test]
    fn example1() {
        assert_eq!(
            is_legitimate(&[
                vec![0, 0, 0, 0, 0, 0, 0, 0],
                vec![0, 0, 1, 1, 1, 0, 0, 0],
                vec![0, 1, 1, 1, 1, 1, 0, 0],
                vec![0, 0, 0, 0, 0, 0, 0, 0]
            ]),
            Some(true)
        );
    }

    #[test]
    fn example2() {
        assert_eq!(
            is_legitimate(&[
                vec![0, 0, 0, 0, 0, 0, 0, 0],
                vec![0, 0, 1, 1, 1, 0, 0, 0],
                vec![0, 1, 1, 1, 1, 1, 0, 0],
                vec![0, 0, 1, 1, 1, 0, 0, 0]
            ]),
            Some(false)
        );
    }

    #[test]
    fn example3() {
        assert_eq!(
            is_legitimate(&[
                vec![0, 0, 0, 0, 0],
                vec![0, 1, 1, 1, 0],
                vec![0, 1, 1, 1, 0],
                vec![0, 0, 0, 0, 0]
            ]),
            Some(true)
        );
    }
}