fn main() {
	let mut n = String::new();
	std::io::stdin().read_line(&mut n).ok();
	let mut n: usize = n.trim().parse().unwrap();
	let mut s = String::new();
	if n % 2 == 1 {
		s += "7";
		n -= 3;
	}
	while n > 0 {
		s += "1";
		n -= 2;
	}
	println!("{}", s);
}