import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Tester2 {
	public static void main(String[] args){
		try(BufferedReader br = new BufferedReader(new InputStreamReader(System.in))){
			int i = Integer.parseInt(br.readLine());
			System.out.println(i*10);
		}catch(IOException e) {
			e.printStackTrace();
		}
	}
}