import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		char[] arr = new char[n / 2];
		Arrays.fill(arr, '1');
		if (n % 2 == 1) {
		    arr[0] = '7';
		}
		System.out.println(arr);
   }
}