using System;
public class Program
{
    public static void Main()
    {
        int x = int.Parse(Console.ReadLine() ?? string.Empty);
        //string[] pass = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string a = Console.ReadLine() ?? string.Empty;

        string num = "";
        if(x % 2 == 0)
        {
            int aa = x / 2;
            for (int i = 1; i <= aa;i++)
            {
                num += "1";
                x -= 2;
            }
        }
        else
        {

            x -= 3;
            num += "7";
            int aa = x / 2;
            for (int i = 1; i <= aa; i++)
            {
                num += "1";
                x -= 2;
            }
        }
        Console.WriteLine(num);
    }
}