import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{
	public static void main(String[] args) {
		try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
			int n = Integer.parseInt(br.readLine());
			int sum = 0;
			StringBuilder sb = new StringBuilder();

			if (n % 2 != 0) {
				sb.append(7);
				n -= 3;
			}
			for (int i = 0; i < n / 2; i++) {
				sb.append(1);
			}

			System.out.println(sb);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}