#include <bits/stdc++.h>
using namespace std;
constexpr int Inf = 1000000010;
constexpr long long INF = 2000000000000000010;
template <typename T> inline bool chmax(T &a, T b) { if (a < b) { a = b; return true;} return false;}
template <typename T> inline bool chmin(T &a, T b) { if (a > b) { a = b; return true;} return false;}

template <typename T, typename U>
T modpow(T N, U P, T M = -1) {
    if (P < 0) return 1;
    T ret = 1;
    if (M != -1) ret %= M;
    while (P) {
        if (P & 1) {
            if (M == -1) ret *= N;
            else ret = ret * N % M;
        }
        P /= 2;
        if (M == -1) N *= N;
        else N = N * N % M;
    }
    return ret;
}

constexpr long long MOD = 998244353;

int main() {
    long long gx,gy;
    cin >> gx >> gy;
    if((gx + gy) % 2 != 0) cout << (gx == 0 ? 0 : 1) + (gy == 0 ? 0 : 1) << endl;
    else {
        int ret = (gx == 0 ? 0 : 1) + (gy == 0 ? 0 : 1);
        if(abs(gx) == abs(gy)) chmin(ret,1);
        else chmin(ret,2);
        cout << ret << endl;
    }
}