import java.util.Scanner;

class Main {
	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();

		String ans = "";
		if(n % 2 == 1) {
			ans = "7";
			n -= 3;
		}
		for(int i=0; i<n; i+=2) {
			ans += "1";
		}

		System.out.println(ans);
	}
}