#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;

int main()
{
    ll x, y;
    cin >> x >> y;
    cout << ((x != y) ? (min(x, y)*2 + (max(x, y) - min(x, y) - 1)*2 + 1) : x*2) << endl;
}