fn main() {
    let n = read();
    let mut p = (1..=n).collect::<Vec<_>>();
    p.sort_by(|a, b| {
        println!("? {} {}", *a, *b);
        let res = read();
        use std::cmp::Ordering::*;
        if res == 1 {
            Less
        } else {
            Greater
        }
    });
    println!("!");
    println!("{}", p.len());
    use util::*;
    println!("{}", p.iter().join(" "));
}

fn read() -> usize {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    s.trim().parse().unwrap()
}

mod util {
    pub trait Join {
        fn join(self, sep: &str) -> String;
    }

    impl<T, I> Join for I
    where
        I: Iterator<Item = T>,
        T: std::fmt::Display,
    {
        fn join(self, sep: &str) -> String {
            let mut s = String::new();
            use std::fmt::*;
            for (i, v) in self.enumerate() {
                if i > 0 {
                    write!(&mut s, "{}", sep).ok();
                }
                write!(&mut s, "{}", v).ok();
            }
            s
        }
    }
}