import java.util.*;

public class Run {
    public static void main (String arg[]) {
        Scanner scan = new Scanner(System.in);
         int N = scan.nextInt();
        if (N < 2 || N > 100000) System.exit(1);

        if (N%2==1) {
            System.out.print(7);
            N -= 3;
        }
        for (int i = 0; i < N/2; i++) {
            System.out.print(1);
        }
    }
}