import java.io.File;
import java.util.Scanner;

class Container {
	public int add(int value) {
		values[size] = value;
		size++;
		return size;
	}

	public int size() {return size;}

	public boolean isEmpty() {return size() == 0;}

	public int find(int value) {return find(0, value);}

	private int find(int index, int value) {
		if (index == size-1) return -1;
		if (values[index] == value) return index;
		return find(index+1, value);
	}

	public int get(int index) {return values[index];}

	public String toString() {
		String result = "{";
		for (int i = 0; i < size; i++)
			result += values[i] + (i < size-1 ? ", " : "");
		return result + "}";
	}
	
	static final int CAPACITY = 100;
	private int [] values = new int[CAPACITY];
	private int size = 0;
}