using System;
using System.Collections.Generic;

class Program
{
    static string InputPattern = "Input4";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("2");
            //1
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("3");
            //7
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("4");
            //11
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();
        int N = int.Parse(InputList[0]);

        //偶数の場合
        if (N % 2 == 0) {
            Console.WriteLine(new string('1', N / 2));
        }
        else { //奇数の場合
            Console.WriteLine("7" + new string('1', N / 2 - 1));
        }
    }
}