import java.util.Scanner;

class MaxMatching {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int input = scan.nextInt();
		String ret = "";
		int loop = input / 2 -1;
		for (int i = 0; i < loop; i++) {
			ret += "1";
		}
		if (input % 2 == 0) {
			ret = "1" + ret;
		} else {
			ret = "7" + ret;
		}
		System.out.println(ret);
	}
}