using System;

namespace Saidai_Matching
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            if (N % 2 == 1)
            {
                Console.Write("7");
                N -= 3;
            }
            for(; N >=2; N-=2)
            {
                Console.Write("1");
            }
            Console.WriteLine();
        }
    }
}