import java.util.Random;

public class Agenda {
  
    private Event[] elems;
    private int size;
  
    public Agenda(int capacity) {
        // pre-condition: capacity > 0
        
        elems = new Event[capacity];
        size = 0;
    }
  
    public int getSize() {
        return size;
    }
  
    public void add(Event e) {
        elems[size] = e;
        size = size + 1;
    }
  
    public Event sample() {
    
        Random generator;
        generator = new Random();
    
        int index;   
        index = generator.nextInt(size);
    
        return elems[index];
    }
  
    public Event get(int pos) {
        // pre-condition: 0 < pos < size

        return elems[pos];
    }
  
}