using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace template
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            Console.Write(n % 2 == 0 ? "1" : "7");
            for (int i = 0; i < n / 2 - 1; i++)
            {
                Console.Write(1);
            }
            Console.WriteLine();
        }
    }
}