Account Balance

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _06.Account_Balance
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int S = 0;
            double B = 0.0;

            while (S < N)
            {
                double T = double.Parse(Console.ReadLine());
                if (T < 0)
                {
                    Console.WriteLine("Invalid operation!");
                    break;

                }
                else
                {
                    B += T;
                    Console.WriteLine($"Increase: {T:F2}");
                }
                S++;

            }
            Console.WriteLine($"Total: {B:F2}");

        }
    }
}

/*
--- Var Legend

N = Number
S = Sumer
B = Balance
T = Total

*/