#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define repr(i, n) for (int i = (n) - 1; i >= 0; i--)
#define range(a) a.begin(), a.end()

int main() {
    int a, b; cin >> a >> b;
    if (a == b) {
        cout << a + b - 1 << endl;
    } else {
        cout << min(a, b) * 2 << endl;
    }
}