use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let mut n: usize = itr.next().unwrap().parse().unwrap();

    let mut out = Vec::new();
    if n & 1 == 1 {
        write!(out, "{}", 7).ok();
        n -= 3;
    }
    for _ in 0..n / 2 {
        write!(out, "{}", 1).ok();
    }
    stdout().write_all(&out).unwrap();
}