using System;
using System.Text;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        StringBuilder sb = new StringBuilder();
        if(n % 2 == 1)
        {
            sb.Append("7");
            n -= 3;
        }
        for(int i = 0; i < n; i += 2)
        {
            sb.Append("1");
        }
        Console.WriteLine($"{sb}");
    }
}