#include #include #include #include #include #include #include using namespace std; using uint = unsigned int; using ll = long long; #define CIN( LL , A ) LL A; cin >> A #define GETLINE( A ) string A; getline( cin , A ) #define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) int main() { CIN( ll , A ); CIN( ll , B ); const ll min = A < B ? A : B; const ll max = A + B - min; const ll answer = min * 2 + ( min == max ? -1 : 0 ); cout << answer << endl; return 0; }