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

public class Main {
	public static void main(String[] args) {
		BufferedReader buff = new BufferedReader(new InputStreamReader(System.in));

		try {

			int count = Integer.parseInt(buff.readLine());
			String ans = "";
			while(count > 0){
				if(count == 3){
					ans = 7 + ans;
					break;
				}else{
					count -= 2;
					ans += 1;
				}
			}
			System.out.println(ans);
		} catch (NumberFormatException e) {
			e.getStackTrace();
		} catch (IOException e) {
			e.getStackTrace();
		} catch (Exception e) {
			e.getStackTrace();
		}
	}
}