public static void main(String[] args) {
	Tree drevo = new Tree();
	long start = System.currentTimeMillis();
	int i = 0, meja = 10000;
	while ( i++ < meja) {
		drevo.insert( (int)Math.random()*100 );
	}
	System.out.print( (System.currentTimeMillis()-start) + " milisekund" );
}