macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        let mut next = || { iter.next().unwrap() };
        input_inner!{next, $($r)*}
    };
    ($($r:tt)*) => {
        let stdin = std::io::stdin();
        let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
        let mut next = move || -> String{
            bytes
                .by_ref()
                .map(|r|r.unwrap() as char)
                .skip_while(|c|c.is_whitespace())
                .take_while(|c|!c.is_whitespace())
                .collect()
        };
        input_inner!{next, $($r)*}
    };
}

macro_rules! input_inner {
    ($next:expr) => {};
    ($next:expr, ) => {};
    ($next:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($next, $t);
        input_inner!{$next $($r)*}
    };
}

macro_rules! read_value {
    ($next:expr, ( $($t:tt),* )) => {
        ( $(read_value!($next, $t)),* )
    };
    ($next:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
    };
    ($next:expr, Chars) => {
        read_value!($next, String).chars().collect::<Vec<char>>()
    };
    ($next:expr, Usize1) => {
        read_value!($next, usize) - 1
    };
    ($next:expr, $t:ty) => {
        $next().parse::<$t>().expect("Parse error")
    };
}

fn main() {
    input! {
        n: usize,
        p: [Usize1; n],
    }
    let mut idx = vec![0; n];
    for (i, &p) in p.iter().enumerate() {
        idx[p] = i;
    }
    let mut v = (0..n).collect::<Vec<_>>();
    let mut used = vec![false; n];
    let mut ans = vec![];
    for x in 0..n {
        let i = idx[x];
        if i != v[i] || i == n - 1 {
            continue;
        }
        let j = if i + 1 != tail(v[i + 1], &mut v) {
            tail(v[i + 1], &mut v) + 1
        } else {
            i + 1
        };
        if j == n {
            continue;
        }
        if used[i] || used[j] {
            continue;
        }
        if i > 0 && used[i - 1] {
            union(i, i - 1, &mut v);
        }
        if j < n - 1 && used[j + 1] {
            union(j, j + 1, &mut v);
        }
        union(i, i + 1, &mut v);
        union(j - 1, j, &mut v);
        used[i] = true;
        used[j] = true;
        ans.push(p[i]);
        ans.push(p[j]);
    }
    for (i, ans) in ans.iter().enumerate() {
        if i > 0 {
            print!(" ");
        }
        print!("{}", ans + 1);
    }
    println!();
}

fn tail(x: usize, v: &mut Vec<usize>) -> usize {
    if x == v[x] {
        x
    } else {
        v[x] = tail(v[x], v);
        v[x]
    }
}

fn union(x: usize, y: usize, v: &mut Vec<usize>) {
    let tx = tail(x, v);
    let ty = tail(y, v);
    if tx < ty {
        v[tx] = ty;
    } else {
        v[ty] = tx;
    }
}