/*
Alex, Sam, and Jamie are organizing a concert and need a Dart program to help them track ticket sales.

They want to:
Set Ticket Prices: Declare the price per ticket and set an initial number of sold tickets.

Calculate Revenue: Calculate the total revenue and display it using string interpolation.

Track Age Group: Depending on the customer's age, they want to print a message offering discounts to seniors (60+) and children (under 12).

Loop through Ticket Sales: Use a loop to simulate ticket sales until they reach the target of 200 tickets.

Ternary Operator for Late Fee: Add a late fee if the total tickets are sold after a certain hour, using a ternary operator.
*/

import 'dart:io';

void main(){

  // set ticket prices
  double pricePerTicket = double.parse(stdin.readLineSync()!);
  int ticketsSold = int.parse(stdin.readLineSync()!);

  // calculate revenue
  double totalRevenue = (ticketsSold * pricePerTicket).toDouble();
  print("Total revenue: $totalRevenue");

  // track age group
  int age = int.parse(stdin.readLineSync()!);
  if(age >= 60){
    print("Senior discount applied!");
  } else if(age <= 12){
    print("Child discount applied!");
  } else {
    print("No discount applied!");
  }

  // loop through ticket sales
  ticketsSold = 0;
  while(ticketsSold < 200){
    int soldHour = int.parse(stdin.readLineSync()!);
    ticketsSold += soldHour;
    print("Tickets sold: $ticketsSold");
  }

  // ternary operator for late fee
  String isLateResponse = stdin.readLineSync()!;
  bool isLate = (isLateResponse == "y") ? true : false;
  totalRevenue = totalRevenue + (isLate ? 0: 50);
  print("Total revenue with late fee: $totalRevenue");
}