#include<bits/stdc++.h> #define REP(i,n) for(int i=0;i<(n);i++) #define ALL(v) (v).begin(),(v).end() #define int long long using namespace std; typedef pair<int,int> P; //----------------------------------------------------------------------- signed main() { cin.tie(0); ios::sync_with_stdio(false); int x,y; cin>>x>>y; if(x==y) cout<<0<<endl; else if(y==0) cout<<1<<endl; else if(x==0) cout<<2<<endl; else if(x==-y) cout<<3<<endl; else cout<<-1<<endl; }