using System;
using System.Collections.Generic;
using System.Text;

namespace Problem083
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            var ans = new StringBuilder();
            Process(n, ans);
            Console.WriteLine(ans);
            Console.ReadKey();
        }

        static void Process(int n, StringBuilder ans)
        {
            if (n >= 3 && n != 4)
            {
                ans.Append(7);
                n -= 3;
            } else if (n >= 2)
            {
                ans.Append(1);
                n -= 2;
            }
            if (n >= 2) Process(n, ans);
        }
    }
}