import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class No0083 {
	public static void main(String[] args){
		try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))){
			int n = Integer.parseInt(br.readLine());
			if(n%2 == 0){
				System.out.print(1);
			}else{
				System.out.print(7);
			}
			for(int i=0; i<n/2-1; i++){
				System.out.print(1);
			}
			System.out.println();
		}catch(IOException e){
			e.printStackTrace();
		}
	}
}