1040.java

import java.io.IOException;
import java.util.Scanner;

public class Main {
    
    public static double arredonda(double x, int casas) {
        double pot10 = Math.pow(10, casas);
        return Math.floor(x*pot10) / pot10;
    }
 
    public static void main(String[] args) throws IOException {
 
        double N1, N2, N3, N4, E;
        double media;

        Scanner sc = new Scanner(System.in);
        
        N1 = sc.nextDouble();
        N2 = sc.nextDouble();
        N3 = sc.nextDouble();
        N4 = sc.nextDouble();
        
        media = (2*N1 + 3*N2 + 4*N3 + N4)/10;
        media = arredonda(media, 1);
        
        System.out.printf("Media: %.1f\n", media);
        
        if (media >= 7) {
            System.out.println("Aluno aprovado.");
        } else if (media < 5) {
            System.out.println("Aluno reprovado.");
        } else {
            System.out.println("Aluno em exame.");
            E = sc.nextDouble();
            System.out.printf("Nota do exame: %.1f\n", E);
            media = (E + media)/2;
            
            if (media >= 5) {
                System.out.println("Aluno aprovado.");
            } else {
                System.out.println("Aluno reprovado.");
            }
            
            System.out.printf("Media final: %.1f\n", media);
        }
        
    }
 
}