import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        if(n%2==0) System.out.print("1");
        else System.out.print("7");

        while(n>3) {
            System.out.print("1");
            n-=2;
        }
        System.out.println();
    }
}