public class TestScores {
	
	private int[] scores;
	
	public TestScores(int[] arr) {
		this.scores = new int[arr.length];
		
		for (int i = 0; i < arr.length; i++){
			if (arr[i] > 100 || arr[i] < 0)
				throw new IllegalArgumentException("Invalid argument: " + arr[i]);
			else
				this.scores[i] = arr[i];
		}
	}
	
	public double getAverage(){
		double sum = 0;
		for (int i = 0; i < this.scores.length; i++)
			sum += scores[i];
		return sum / scores.length;
			
	}
	
	
	public static void main(String[] args) {
		int[] arr = {-8,2,3,4,5,5,600};
		try {
			TestScores ts = new TestScores(arr);
			System.out.println(ts.getAverage());
		}
		catch (IllegalArgumentException e){
			System.out.println(e.getMessage());
		}
	}
}