import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
double sum = 0.0;
while(sc.hasNextDouble()) {
sum += sc.nextDouble();
}
System.out.println(String.format("%.2f",sum) + " " + String.format("%.2f",sum/3));
}
}
// 实现输出时保留2位小数
System.out.print(String.format("%.2f",num));
// num处填要输出结果的变量表达式