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/3;
        var b = 0;
        if(n-a*3 == 1){
            a--;
            b = 2;
        }
        else if(n==2){
            b = 1;
        }
        for(var i=0;i<a;i++){
            Console.Write(7);
        }
        for(var i=0;i<b;i++){
            Console.Write(1);
        }
        Console.WriteLine();
    }
}