package net.ipipip0129.yukicoder.no83;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int mNumber = Integer.parseInt(br.readLine());
        if (mNumber % 2 == 1) {
            System.out.print(7);
            mNumber -= 3;
        }

        for (int i = 0; i < mNumber / 2; i++) {
            System.out.print(1);
        }

        System.out.println();

        br.close();
    }
}