import java.util.ArrayList;


public class Numbers {
	private int[] arr;
	private int numE;
	private final int INIT_SIZE = 100;



	public Numbers(int size){
		arr = new int[size];
		numE = 0;
	}

	public Numbers(){
		arr = new int[100];
		numE = 0;
	}

	public void add(int num){
		if(numE == arr.length-1){
			enlargeArray();
		}

		arr[numE] = num;
		numE++;


	}

	private void enlargeArray(){
		int[] temp = new int[(arr.length)*2];
		for(int i = 0; i < arr.length-1; i++){
			temp[i] = arr[i];
		}
		arr = temp;
	}

	public void remove(int num){
		ArrayList<Integer> temp = new ArrayList<Integer>();
		for(int i = 0; i < numE; i++){
			if(arr[i] == num){
				numE--;
			} else temp.add(arr[i]);
		}
		temp.toArray(new int[arr.size]);
		arr = temp;
	}

	public String toString(){
		System.out.print("[ ");
		for(int i = 0; i < numE; i++){
			System.out.print(arr[i]+" ");
		}
		System.out.print("]");
		//add it to a string like a normal program
	}


	public static void main(String[] args){
		Numbers N = new Numbers(3);
		N.add(4);
		N.toString();
	}

}