class hotel {
  static float budget = 85;
  static int numFloors = 0;
  static int[] floorsOnRoom = new int[20];
  static int numDecorations = 0;

  public static void main(String[] args) {

    buyRoom(1,2);
    buyRoom(2,2);
    buyRoom(3,2);
    buyRoom(4,2);
    buyRoom(5,2);
    buyRoom(6,2);
    buyRoom(7,2);

    System.out.printf("Week 1 Pre: %.3f\n", budget);
    budget += gefw(1);
    System.out.printf("Week 1: %.3f\n", budget);

    buyRoom(8,2);
    buyDec(8);

    System.out.printf("Week 2 Pre: %.3f\n", budget);
    budget += gefw(1);
    System.out.printf("Week 2: %.3f\n", budget);

    buyRoom(9,2);
    buyRoom(10,2);
    buyRoom(11,2);
    buyRoom(12,2);
    buyRoom(13,2);

    System.out.printf("Week 3 Pre: %.3f\n", budget);
    budget += gefw(1);
    System.out.printf("Week 3: %.3f\n", budget);

    buyRoom(1,1);
    buyRoom(2,1);
    buyRoom(3,1);
    buyRoom(4,1);
    buyRoom(5,1);
    buyRoom(6,1);
    buyRoom(7,1);
    buyRoom(8,1);
    buyRoom(9,1);
    buyRoom(10,1);
    buyRoom(11,1);
    buyRoom(12,1);
    buyRoom(13,1);
    buyDec(4);

    System.out.printf("Week 4 Pre: %.3f\n", budget);
    budget += gefw(1);
    System.out.printf("Week 4: %.3f\n", budget);



    budget += gefw(4);
    System.out.printf("Week 8: %.3f\n", budget);
  }

  static void buyRoom(int floor, int times) {
    for (int x = 0; x < times; x++) {
      if (floorsOnRoom[floor-1] == 0) {
        numFloors++;
      }
      budget -= 6;
      floorsOnRoom[floor-1]++;
    }
  }

  static void buyDec(int num) {
    for (int x = 0;x < num; x++) {
      budget -= 3;
      numDecorations++;
    }
  }

  static float gefw(int times) {
    float totearn = 0;
    for (int i = 0; i < times; i++) {
      float earnings = 0;

      //Add money from rooms
      for (int x = 0; x < numFloors; x++) {
        earnings += floorsOnRoom[x] * (x+1);
      }

      //Add money from decorations
      float dec = numDecorations * 5.0f / 100.0f;
      earnings += earnings * dec;
      //Deduct tax
      float tax = earnings * (numFloors * 5.0f / 100.0f);
      earnings -= tax;
      totearn += earnings;
    }
    return totearn;
  }
}