import java.util.*;

public class Main {
    public static void main(String... args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        StringBuilder sb=new StringBuilder();
        for (int i = 0; i < n / 2; i++) {
            sb.append(1);
        }
        if(n%2==1){
            sb.insert(0,7);
            sb.deleteCharAt(sb.length()-1);
        }
        System.out.println(sb);
    }
}