import java.util.Scanner;

class MaxMatching {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		System.out.print("数値を入力してください:");
		int input = scan.nextInt();
		String ret = "";
		int mod = input % 2;
		if (mod == 0) {
			int quot = input / 2;
			for (int i = 0; i < quot; i++) {
				ret += "1";
			}
		} else {
			ret += "7";
			int quot = (input - 3) / 2;
			for (int i = 0; i < quot; i++) {
				ret += "1";
			}
		}
		System.out.println(ret);
	}
}