package workspace.gomi;
import java.io.*;
public class temp{
    public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int n=Integer.parseInt(br.readLine());
        String s="";
        if(n%2==1){
            n-=3;
            s="7";
        }
        n/=2;
        for(int i=0;i<n;i++) s=s+"1";
        System.out.println(s);
    }
}