package com.company;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());
        int counter = 0;
        double balance = 0.0;
        while (counter < n) {
            double amount = Double.parseDouble(scanner.nextLine());
            if (amount < 0) {
                System.out.println("Invalid operation!");
                break;

            } else {
                balance += amount;
                System.out.printf("Increase: %.2f%n", amount);
            }
            counter++;

        }
        System.out.printf("Total: %.2f%n", balance);

    }
}