using System;
using System.Collections.Generic;
using System.Linq;
public class Program{
    public static void Main(){
        var n = int.Parse(Console.ReadLine());
        var a = n/6;
        var b = 0;
        n -= a*6;
        if(n == 1){
            a--;
            b++;
        }
        else if(n == 3){
            b++;
        }
        else if(n == 5){
            a++;
            b++;
        }
        else{
            a += n/2;
        }
        for(var i=0;i<b;i++){
            Console.Write(7);
        }
        for(var i=0;i<a;i++){
            Console.Write(1);
        }
        Console.WriteLine();
    }
}