package no083;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		StringBuilder sb = new StringBuilder();
		if (n%2 == 1) {
			sb.append('7');
			n -= 3;
		}
		while(n >= 2) {
			sb.append('1');
			n -= 2;
		}
		System.out.println(sb.toString());
	}

}