import java.util.*;
import java.math.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        int n = sc.nextInt();
        int cnt = n/2;
        int d = n%2;
        String s = d == 1 ? "7" : "1";
        for (int i = 1;i < cnt;i++) {
            s += "1";
        }
        System.out.println(s);
    }
}