#include <bits/stdc++.h>
using namespace std;

using ll = long long;

#define rep2(i, m, n) for (int i = (m); i < (n); ++i)
#define rep(i, n) rep2(i, 0, n)
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)
#define all(...) std::begin(__VA_ARGS__), std::end(__VA_ARGS__)
#define rall(...) std::rbegin(__VA_ARGS__), std::rend(__VA_ARGS__)
#define INF 1001001001001001001ll
#define inf (int)1001001000

ll gcd(ll x, ll y) {	if (x == 0) return y;	return gcd(y%x, x);} 
ll lcm(ll x, ll y) { __int128_t xx,yy; xx=x; yy=y; __int128_t ans=xx * yy / gcd(x, y); ll ans2=ans; return ans2; }
template<typename T>
T POW(T x, ll n){T ret=1;	while(n>0){		if(n&1) ret=ret*x;		x=x*x;		n>>=1;	}	return ret;}
template<typename T>
T modpow(T a, ll n, T p) {	if(n==0) return (T)1;  if (n == 1) return a % p;  if (n % 2 == 1) return (a * modpow(a, n - 1, p)) % p;  T t = modpow(a, n / 2, p);  return (t * t) % p;}
template<typename T>
T modinv(T a, T m) {	if(m==0)return (T)1;	T b = m, u = 1, v = 0;	while (b) {		T t = a / b;		a -= t * b; swap(a, b);		u -= t * v; swap(u, v);	}	u %= m;	if (u < 0) u += m;	return u;}
/*
const int MAXCOMB=510000;
std::vector<mint> fac(MAXCOMB), finv(MAXCOMB), inv(MAXCOMB);
void COMinit() {fac[0] = fac[1] = 1;finv[0] = finv[1] = 1;inv[1] = 1;for (int i = 2; i < MAXCOMB; i++) {fac[i] = fac[i - 1] * i;inv[i] = mint(0) - inv[mint::mod() % i] * (mint::mod() / i);finv[i] = finv[i - 1] * inv[i];}}
mint COM(int n, int k) {if (n < k) return 0;if (n < 0 || k < 0) return 0;return fac[n] * finv[k] * finv[n - k];}
*/
template <typename T> inline bool chmax(T &a, T b) { return ((a < b) ? (a = b, true) : (false));}
template <typename T> inline bool chmin(T &a, T b) { return ((a > b) ? (a = b, true) : (false));}

int SOLVEFIN = 0;

void solve(){
	ll a,b;
	cin>>a>>b;
	if(a==0 && b==0)cout<<0<<endl;
	else if(a==0 | b==0)cout<<1<<endl;
	else if(a+b==0 || a-b==0)cout<<1<<endl;
	else cout<<2<<endl;
   
}

signed main(){
	cin.tie(0);
	ios::sync_with_stdio(0);
	cout<<fixed<<setprecision(20);
	while(SOLVEFIN == 0) solve();
}