import java.util.Scanner;

public class N083 {

	public static void main(String[] args) {

		Scanner sca = new Scanner(System.in);

		int n = sca.nextInt();

		if (n % 2 == 1) {
			System.out.print("7");
			n -= 2;
		}

		while (n > 1) {
			System.out.print("1");
			n -= 2;
		}

		System.out.println();

	}

}