using System;
using System.IO;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Numerics;
using System.Diagnostics;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using static System.Math;
using static System.Console;


namespace yukicoder
{
    class Program
    {
        static void Main()
        {
            var n = int.Parse(Console.ReadLine());
            var ans = "";

            while(n >= 1)
            {
                if (n % 2 == 0)
                {
                    ans += "1";
                    n -= 2;
                }
                else
                {
                    ans += "7";
                    n -= 3;
                }
                
            }

            Console.WriteLine(ans);

        }
        
    }
}