import java.util.Scanner;

class Main {
	public static void main(String... args) {
		Scanner sc = new Scanner(System.in);
		int matchQty = sc.nextInt();
		System.out.println(matchNum(matchQty));
	}

	public static String matchNum(int matchQty) {


		StringBuilder sb = new StringBuilder("");
		if (matchQty % 2 == 0) {
			for (int i = 0; i < matchQty / 2; i++) {
				sb.append("1");
			}
		} else {
			sb.append("7");
			matchQty -= 3;
			for (int i = 0; i < matchQty / 2; i++) {
				sb.append("1");
			}
		}
		return sb.toString();

	}
}