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

namespace yukicoder_83 {
    class Program {
        static void Main(string[] args) {
            int n = int.Parse(Console.ReadLine());
            string ans;
            if (n % 2 == 0) {
                ans = "1";
            } else {
                ans = "7";
            }
            int keta = n / 2;
            for (int i = 0; i < keta - 1; i++) {
                ans += 1;
            }
            Console.WriteLine(ans);
            Console.ReadLine();
        }
    }
}