/*
+---------------+
| rs            |
+---------------+
| String name   |
| int length    |
| int startTime |
| int stopTime  |
| IAds ad       |
+---------------+

*/

// To describe a radio show
class rs {
  String name;
  int length;
  int startTime;
  int stopTime;
  IAds ad;

  rs(String name, int length, int startTime, int stopTime, IAds ad) {
    this.name = name;
    this.length = length;
    this.startTime = startTime;
    this.stopTime = stopTime;
    this.ad = ad;
  }
}

// To describe an IAd
interface IAds {
}

// to decribe an ad
class Ad implements IAds {
  String name;
  int length;
  int profit;

  Ad(String name, int length, int profit) {
    this.name = name;
    this.length = length;
    this.profit = profit;
  }
}

// to describe a public service announcement
class PSA implements IAds {
  String code;
  int length;

  PSA(String code, int length) {
    this.code = code;
    this.length = length;
  }
}