import java.util.Scanner;

public class SubjectScore $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($System$.$in$)$;

int italianScore;

int danceScore;

int germanScore;

int numScores;

double averageScore;

italianScore $=$ scnr$.$nextInt$()$;

danceScore $=$ scnr$.$nextInt$()$;

germanScore $=$ scnr$.$nextInt$()$;

numScores $=$ scnr$.$nextInt$()$;

$/*$ Your code goes here $*/$

System.out.println$($averageScore$)$;

$\}$

$\}$