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