import java.io.*; import java.util.*; import java.util.stream.*; public class Main { static int MOD; public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); char[] num = sc.next().toCharArray(); if (isOdd(num) || canDiv4(num)) { System.out.println("1"); } else { System.out.println("-1"); } } static boolean isOdd(char[] num) { return (num[num.length - 1] - '0') % 2 == 1; } static boolean canDiv4(char[] num) { int ans = 0; for (char c : num) { ans *= 10; ans += c - '0'; ans %= 4; } return ans == 0; } } class Utilities { static String arrayToLineString(Object[] arr) { return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n")); } static String arrayToLineString(int[] arr) { return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new)); } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); StringBuilder sb = new StringBuilder(); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public int[] nextIntArray() throws Exception { return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray(); } public String next() throws Exception { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }