#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define REP(i, n) rep(i, 0, n)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
#define int long long
#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)
using namespace std;
typedef pair<int, int> P;
typedef pair<int, P> PP;
const int mod = 1000000007;
const int INF = 1e12;

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int x, y, ans = 0;
    cin >> x >> y;
    if(x == y){
        cout << 0 << endl;
    }else if(x == 0){
        if(x < y) ans++;
        cout << ans + 1 << endl;
    }else if(y == 0){
        cout << 1 << endl;
    }else{
        cout << -1 << endl;
    }
}