fn rotate(array: &mut [usize], start: usize) {
    array.swap(start, start + 1);
    array.swap(start + 1, start + 2);
}

pub fn larry_array(mut array: Vec<usize>) -> Result<bool, String> {
    let mut next = 1;

    while next <= array.len() {
        let mut index = match array.iter().position(|&e| e == next) {
            Some(x) => x,
            None => {
                return Err(
                    "The array must contains all the numbers from 1 to the array's length"
                        .to_owned(),
                );
            }
        };

        if index != next - 1 && next == array.len() - 1 {
            return Ok(false);
        }

        while index != next - 1 {
            let start = std::cmp::max(index - 2, next - 1);
            let end = start + 2;
            rotate(&mut array, start);
            index = (end + index - 1) % end;
        }

        next += 1;
    }

    Ok(true)
}