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

    let count = n / 2;
    for i in 0..count {
        if i == 0 && n % 2 == 1 {
            print!("7");
        } else {
            print!("1");
        }
    }
    println!("");
}