import java.util.Scanner;

public class Yukicoder83 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		if (N % 2 == 0) System.out.print("1");
		else System.out.print("7");
		for (int i = 1; i < N / 2; i++) {
			System.out.print("1");
		}
		System.out.println("");
	}
}