Grandpa Stavri

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int days = Integer.parseInt(scanner.nextLine());
        double currentLiters, currentGradus, averageGradus = 0, totalLiters = 0;

        for (int i = 0; i < days; i++) {
            currentLiters = Double.parseDouble(scanner.nextLine());
            currentGradus = Double.parseDouble(scanner.nextLine());
            averageGradus += currentLiters * currentGradus;
            totalLiters += currentLiters;
        }

        averageGradus /= totalLiters;

        System.out.printf("Liter: %.2f\nDegrees: %.2f\n", totalLiters, averageGradus);

        if (averageGradus < 38) {
            System.out.println("Not good, you should baking!");
        } else if (averageGradus > 42) {
            System.out.println("Dilution with distilled water!");
        } else {
            System.out.println("Super!");
        }
    }
}