import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        String ans="";
        if (n%2>0){
            ans+=7;n-=3;
        }
        for (int i=0;i<n;i+=2){
            ans+=1;
        }
        System.out.println(ans);
    }
}