using System;
class Program
{
    static void Main(string[] args)
    {
        string s = Console.ReadLine();
        int Matti = int.Parse(s);
        int Keta = Matti / 2;
        string Ans = string.Empty;
        Ans = Matti % 2 == 1 ? "7" : "1";
        for(int Loop = 1; Loop < Keta; Loop++)
        {
            Ans = Ans + "1";
        }
        Console.WriteLine(Ans);
    }
}