ABC_124 - A - Buttons

#include <bits/stdc++.h>

#define SYNC ios::sync_with_stdio(0);
#define F first
#define S second
#define endl '\n'


using namespace std;

using ll = long long int;
using ii = pair<int, int>;
using vii = vector<ii>;
using vi = vector<int>;
using graph = vector<vi>;
const int INF = 0x3f3f3f3f;
const int MAXN = 58;
const ll mod = 1000000007;



int main() {
    SYNC
    int a, b;
    cin >> a >> b;
    cout << max(max(a+a-1, a+b), b+b-1) << endl;

    return 0;
}