using System;
using System.Linq;
using System.Collections.Generic;

class Program {
    static void Main() {
        int n = int.Parse(Console.ReadLine());
        int a = n / 4;
        int b = n % 4;
        string s = "";
        for (int i = 0; i < a; i++) {
            s += "11";
        }
        if (b == 3) {
            s = "7" + s;
        } else if (b == 2) {
            s = "1" + s;
        }
        Console.WriteLine(s);
    }
}