import java.util.Scanner;


public class Main_yukicoder83 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        if (n % 2 == 0) {
        	StringBuilder sb = new StringBuilder();
        	for (int i = 0; i < n / 2; i++) {
        		sb.append('1');
        	}
        	System.out.println(sb);
        } else {
        	n -= 3;
        	StringBuilder sb = new StringBuilder();
        	sb.append('7');
        	for (int i = 0; i < n / 2; i++) {
        		sb.append('1');
        	}
        	System.out.println(sb);
        }

        sc.close();
    }
}