package fr.mathieu852.cdm;

import java.util.*;

public class Main {


	public static void main(String[] args) {
		System.out.println("les notes doivent être séparé d'un espace pour que le calaculateur de moyenne fonctionne");
		Scanner scanner = new Scanner(System.in);
		String Rscanner = scanner.nextLine();
		scanner.close();
		int RDA = 0;
		int RDA2 = 0;
		String[] Tnote = Rscanner.split(" ");
		for(String note:Tnote) {
			switch(note) {
			case "0":
				RDA = 0;
				break;
			case "1":
				RDA = 1;
				break;
			case "2":
				RDA = 2;
				break;
			case "3":
				RDA = 3;
				break;
			case "4":
				RDA = 4;
				break;
			case "5":
				RDA = 5;
				break;
			case "6":
				RDA = 6;
				break;
			case "7":
				RDA = 7;
				break;
			case "8":
				RDA = 8;
				break;
			case "9":
				RDA = 9;
				break;
			case "10":
				RDA = 10;
				break;
			case "11":
				RDA = 11;
				break;
			case "12":
				RDA = 12;
				break;
			case "13":
				RDA = 13;
				break;
			case "14":
				RDA = 14;
				break;
			case "15":
				RDA = 15;
				break;
			case "16":
				RDA = 16;
				break;
			case "17":
				RDA = 17;
				break;
			case "18":
				RDA = 18;
				break;
			case "19":
				RDA = 19;
				break;
			case "20":
				RDA = 20;
				break;
				}
			RDA2 =RDA2 + RDA;

			RDA = 0;


		}

		RDA2 = RDA2/Tnote.length;
		System.out.println("votre moyenne est de "+RDA2);

	}


}