#include <iostream>
#include <vector>
#include <algorithm>
#include <atcoder/modint>
using namespace std;
using i64 = long long;
using modint = atcoder::static_modint<998244353>;
#define rep(i,n) for(int i=0; i<(int)(n); i++)

int main(){
    int a, b; cin >> a >> b;
    if(a > b) swap(a,b);
    int ans = a + b;
    ans += max(0, (b-a)-1);
    cout << ans << endl;
    return 0;
}





struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;