using System;
using System.Collections.Generic;

class No83{
    static void Main(){
        var num=Int32.Parse(Console.ReadLine());
        var length=num/2;
        var isOdd=num%2!=0;
        for(int i=0;i<length;++i){
            if(isOdd&&i==0)Console.Write(7);
            else Console.Write(1);
        }
        Console.WriteLine();
    }
}