using System; using System.Collections.Generic; using System.Linq; using static System.Math; namespace ConsoleApp1 { class Program { static void Main(string[] args) { A(); } static void A() { var nm = ReadSplitInt(); var n = nm[0]; var m = nm[1]; if (n > m) Println(-1); else Println(1); } static List ReadLines(long n) { var l = new List(); for (long i = 0; i < n; i++) { l.Add(ReadLong()); } return l; } static void YESOrNO(bool e) => Println(e ? "YES" : "NO"); static void YesOrNo(bool e) => Println(e ? "Yes" : "No"); static IEnumerable Range(int start, int stop) { if (start < 0 || stop < 0 || start > stop || (start <= 0 && stop <= 0)) return new List(); return Enumerable.Range(start, stop - start); } static bool IsDigit(string str) { var i = 0; return int.TryParse(str, out i); } static int SumDigits(long num) { return num.ToString().Select(x => x.ToString()).Sum(int.Parse); } static int[] ToIntArray(string str) { return str.Select(x => x.ToString()).Select(int.Parse).ToArray(); } static long Gcd(long a, long b) => b == 0 ? a : Gcd(b, a % b); static long Lcm(long a, long b) => a / Gcd(a, b) * b; static bool IsPrime(int x) { if (x <= 1 || (x != 2 && x % 2 == 0)) return false; if (x == 2) return true; for (int i = 3; i < x; i += 2) if (x % i == 0) return false; return true; } static string Read() => Console.ReadLine(); static int ReadInt() => int.Parse(Read()); static long ReadLong() => long.Parse(Read()); static List ReadSplit() => Read().Split().ToList(); static List ReadSplitInt() => Read().Split().Select(int.Parse).ToList(); static List ReadSplitLong() => Read().Split().Select(long.Parse).ToList(); static void Print(object value) => Console.Write(value.ToString()); static void Println(object value) => Console.WriteLine(value.ToString()); static string Join(IEnumerable list) => string.Join("", list); } public static class MyExtensions { public static string Slice(this string str, int start = 0, int stop = 0) { if (start > str.Length || stop > str.Length || start < 0 || stop < 0) return ""; if (stop == 0) stop = str.Length; return str.Substring(start, stop - start); } } }