#[cfg(test)]
mod examples {
    use day18::unique_paths;

    #[test]
    fn example1() {
        assert_eq!(unique_paths(3, 7), 28);
    }

    #[test]
    fn example2() {
        assert_eq!(unique_paths(3, 2), 3);
    }

    #[test]
    fn example3() {
        assert_eq!(unique_paths(7, 3), 28);
    }

    #[test]
    fn example4() {
        assert_eq!(unique_paths(3, 3), 6);
    }
}