/**
 *  author: saad khurshid
 *  created: 2025.04.20 01:42:56
 **/

#include <bits/stdc++.h>
#define fli(i,fc,n) for(int i=fc;i<n;i++)
#define rli(i,n,rc) for(int i=n;i>rc;i--)
#define sz(a) a.size()
#define ll long long
#define pb push_back
#define vi vector<int>
#define vll vector<ll>
#define pi vector<pair<int,int>>
#define pll vector<pair<ll,ll>>
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define nl "\n"
using namespace std;

#ifndef ONLINE_JUDGE
#include "algo/debug.h"
#else
#define debug(...) 42
#endif


void saad(){
    ll gx, gy; cin >> gx >> gy;

    ll r = 0;
    if(gx != 0 && gy != 0) r = 2;
    else if(gx != 0 || gy != 0) r = 1;

    ll b = 1e9;
    if((gx + gy) % 2 == 0){
        if(gx == 0 && gy == 0) b = 0;
        else if(abs(gx) == abs(gy)) b = 1;
        else b = 2;
    }

    cout << min(r,b) << nl;
}

int main() {
    ios::sync_with_stdio(false),cin.tie(nullptr);
    int t = 1;
    while(t--){
        saad();
    }
}