#include <bits/stdc++.h>
#define rep(i, n) for (ll i = 0; i < n; ++i)
typedef long long ll;
using namespace std;
const int INF = 1e9;

int main() {
    int a, b;
    cin >> a >> b;

    int ans = min(a, b) * 2;
    if (a == b)
        --ans;
    cout << ans << endl;

    return 0;
}