import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

class Calculator {
	public static void main(String[] args) {

		Scanner kb = new Scanner(System.in);
		System.out.println("Enter file name");
		String fileName = kb.next();

		int[] array = new int[5];

		Scanner fin = null;
		try {
			fin = new Scanner(new File(fileName));
		}
		catch(FileNotFoundException e) {
			System.out.println("File not found");
			System.exit(0);
		}
		
		fin.useDelimiter(",|\n");

		for(int i = 0; i < 5; i++) {
			array[i] = fin.nextInt();	
		}

		double sum = 0;
		for(int i = 0; i < 5; i++) {
			sum += array[i];
		}

		double mean = sum / 5;

		System.out.printf("Mean: %f\n", mean);

	}
}