#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <tuple>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <cmath>
#include <iomanip>
#include <cassert>
#define rep(i, n) for(int i = 0; i < (int)(n); ++i)
using namespace std;
using lint = int64_t;

int main() {
    int A, B;
    cin >> A >> B;
    if (A < B) swap(A, B);
    if (A == B) {
        cout << A + B - 1 << "\n";
    } else {
        cout << B * 2 << "\n";
    }
    return 0;
}