import java.io.*;

class Test{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int mattiN;
        mattiN=Integer.parseInt(br.readLine());
        if(mattiN%2!=0){
            System.out.print("7");
            mattiN-=3;
        }
        for(;mattiN>0;mattiN-=2){
            System.out.print("1");
        }
        System.out.println();
    }
}