import java.io.*;
class Media
{
	public static void main (String args[])
	{
		InputStreamReader input = new InputStreamReader(System.in);
		BufferedReader tastiera = new BufferedReader(input);

		int s=0;
		System.out.println("Quanti numeri vuoi inserire?");
		try{
			String val= tastiera.readLine();
			int n= Integer.parseInt(val);
		}
		catch(Exception e)
		{
			return;
		}
		for(int i=0;i<n;i++)
		{
			System.out.println("Inserisci valore numero: " + i);
			try{
			String val= tastiera.readLine();
			int num= Integer.parseInt(val);
		}
		catch(Exception e)
		{
			return;
		}
		s=s+num;
		}
		float m= s/n;
		System.out.println("La media vale: " + m);
	}
}