using System;

namespace YukiCorderNo83_20170924 {
    class Program {
        /* 0:6
         * 1:2
         * 2:5
         * 3:5
         * 4:4
         * 5:5
         * 6:6
         * 7:3
         * 8:7
         * 9:6
         * ﾔﾊﾘｿｳｲｳｺﾄﾀﾞｯﾀﾉｶ
         */
        // 1,7,4,5,9,8
        static void Main(string[] args) {
            int N = int.Parse(Console.ReadLine());
            string ans="";
            if (N <= 1) return;
            if (N % 2 != 0) {
                ans += "7";
                N -= 3;
            }
            for (int i = 0; i < (N / 2); i++) {
                ans += "1";
            }
            Console.WriteLine(ans);
        }

        static void ReturnMatchNum(int num) {
        }
    }
}