class Program
{
    static void Main(string[] args)
    {
        string inputNum = Console.ReadLine()!;
        int stickCount = int.Parse(inputNum);

        if (stickCount % 2 == 0)
        {
            int max = stickCount / 2;
            for (int i = 0; i < max; i++)
            {
                Console.Write(1);
            }
        }
        else
        {
            int max = stickCount - 3;
            Console.Write(7);
            max = max / 2;
            for (int i = 0;i < max; i++)
            {
                Console.Write(1);
            }
        }
        Console.WriteLine();
    }
}