#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class T, class U> using Pa = pair<T, U>;
template <class T> using vec = vector<T>;
template <class T> using vvec = vector<vec<T>>;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int A,B;
    cin >> A >> B;
    int ans = 0;
    auto dfs = [&](auto&& self,int a,int b,vec<int>& v)->void{
        if(a==A && b==B){
            int c = 0;
            for(int i=1;i<A+B;i++) c += v[i]!=v[i-1];
            ans = max(ans,c);
        }else{
            if(a+1<=A){
                v.push_back(0);
                self(self,a+1,b,v);
                v.pop_back();
            }
            if(b+1<=B){
                v.push_back(1);
                self(self,a,b+1,v);
                v.pop_back();
            }
        }
    };
    vec<int> v;
    dfs(dfs,0,0,v);
    cout << ans << "\n";
}