// Online compiler C++
#include<bits/stdc++.h>
using namespace std ;
#define nl "\n"
#define int long long
using vi = vector<int> ;

void solve() {
    int x , y ;
    cin >> x >> y ;
    
    if( !x && !y ) cout << 0 << nl ;
    else if( abs(x) == abs(y) || !x || !y ) cout << 1 << nl ; // All 4 dir-bishops
    else cout << 2 << nl ; // dia + rook.
    
}
signed main() {
    int t = 1 ;
    // cin >> t ;
    while( t-- ) {
        solve() ;
    }
    return 0 ;
}