using System;

class Program {
    static void Main() {
        int n = int.Parse(Console.ReadLine());
        string s = "";
        if (n % 2 == 1) {
            Console.Write(7);
            n -= 3;
        }
        for (int i = n; i >= 2; i -= 2) {
            Console.Write(1);
        }
        Console.WriteLine();
    }
}