using System;

public class Program {
	public static void Main() {
		int n = int.Parse(Console.ReadLine());
		string ans = "";
		while (n > 1) {
			if (n % 2 == 0) {
				ans += "1";
				n -= 2;
			} else {
				ans += "7";
				n -= 3;
			}
		}
		Console.WriteLine(ans);
	}
}