using System;

public class Ex {

	int p;
	
	public static int test1 () {
                Ex x = null;
		
		try {
			x.p = 1;
		} catch (NullReferenceException) {
			return 0;
		}
		return 1;
	}
	
	public static int test (int a) {
		int res;
		int fin = 0;
		try {
			res = 10/a;
		} catch (DivideByZeroException ex) {
			if (fin != 1)
				res = 34;
			else
				res = 33;
		} catch {
			if (fin != 1)
				res = 24;
			else
				res = 22;
		} finally {
			fin = 1;
		}
		return res;
	}
	public static int Main () {
		if (test(1) != 10)
			return 1;
		if (test(0) != 34)
			return 2;
		if (test1() != 0)
			return 3;
		
		return 0;
	}
}