fn main() {
    let n: usize = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        buf.trim_end().parse().unwrap()
    };

    let s: Vec<u8> = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let iter = buf.split_whitespace();
        iter.map(|x| x.parse().unwrap()).collect()
    };

    let t: Vec<u8> = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let iter = buf.split_whitespace();
        iter.map(|x| x.parse().unwrap()).collect()
    };

    let mut a = vec![vec![3; n]; n];
    for i in 0..n {
        if s[i] == 1 { continue; }
        for j in 0..n {
            a[i][j] = if s[i] == 0 { 0 } else { 1 };
        }
    }
    for j in 0..n {
        if t[j] == 1 { continue; }
        for i in 0..n {
            a[i][j] = if t[j] == 0 { 0 } else { 1 };
        }
    }

    for i in 0..n {
        if s[i] != 1 || (0..n).any(|j| a[i][j] == 1) { continue; }
        for j in 0..n {
            if t[j] != 1 { continue; }
            if (0..n).any(|k| a[k][j] == 1) { continue; }
            a[i][j] = 1;
            break;
        }
    }

    for i in 0..n {
        if s[i] != 1 || (0..n).any(|j| a[i][j] == 1) { continue; }
        for j in 0..n {
            if a[i][j] == 3 {
                a[i][j] = 1;
                break;
            }
        }
    }
    for j in 0..n {
        if t[j] != 1 || (0..n).any(|i| a[i][j] == 1) { continue; }
        for i in 0..n {
            if a[i][j] == 3 {
                a[i][j] = 1;
                break;
            }
        }
    }

    let mut ans = 0;
    for i in 0..n {
        for j in 0..n {
            if a[i][j] == 1 {
                ans += 1;
            }
        }
    }
    println!("{}", ans);
    println!("{:?}", a);
}