#include //#include using namespace std; #define INF 1.1e9 #define LINF 1.1e18 #define FOR(i,a,b) for (int i=(a);i<(b);++i) #define REP(i,n) FOR(i,0,n) #define ALL(v) (v).begin(),(v).end() #define pb push_back #define pf push_front #define fi first #define se second #define BIT(x,n) bitset(x) #define PI 3.14159265358979323846 typedef long long ll; typedef pair P; typedef pair PP; //----------------------------------------------------------------------------- int x,y; int solve(int x,int y) { if(x==y) return 0; if(x==0) return 2; if(y==0) return 1; return -1; } int main() { cin.tie(0); ios::sync_with_stdio(false); cin>>x>>y; cout<