class Program01 {
	public static void szamol(int[] t) {
		t[0] = t[0] * 2;
		System.out.println(t[0]);
	}	
	public static void main(String[] args) {
		
		int[] t = new int[2];
		t[0] = 4;
		t[1] = 10;
		szamol(t);
		System.out.println(t[0]);
	}
}