public class Aquarium {

	public static void main (String []args) {
		int min = 1;
		int max = 12;
		int size[] = {1};
		System.out.println(peaceful(min, max, size));
	}
	public static int peaceful (int minSize, int maxSize, int[]fishSizes) {
		int num=0;
		for (int i=minSize; i<=maxSize; i++) {
			for (int x=0;x<fishSizes.length; x++) {
				if ((i>10*fishSizes[x] || i<2*fishSizes[x]) || (fishSizes[x]>10*i || fishSizes[x]<2*i)) {
					num++;
					System.out.println(i);
				}
			}

		}
		return num;

	}
}