using System;

namespace Probrem043
{
    class Program
    {
        static void Main(string[] args)
        {
            var input = Console.ReadLine();//.Split(' ');
            var num = int.Parse(input);
            //var b = decimal.Parse(input[1]);
            //var ans = Math.Ceiling(b / a);
            var num2 = num;
            int one = 0;
            string ans = "";

            for(int i = 0; i<num2;i++){                
                if(num < 2) break;
                num -= 2;
                one += 1;                
            }

            if (num == 1) {
                one -= 1;
                ans = "7";
            }

            for (int i = 0; i < one; i++){
                ans += "1";
            }

            Console.WriteLine(ans);
        }
    }
}