using System;

namespace No83_MaximumMatching
{
    internal class Program
    {
        static void Main(string[] args) {
            int n = int.Parse(Console.ReadLine());
            string result = n % 2 == 0 ? "1" : "7";
            for (int i = 0; i < (n - 2) / 2; i++) {
                result += "1";
            }
            Console.WriteLine(result);
        }
    }
}