#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
//const long nPrime = 1000000007;
//const long nPrime = 998244353;
typedef long long ll;
int main() {
    long a,b;
    cin >> a >> b;
    if(a<b){
        swap(a,b);
    }
    if(a==b){
        cout << 2*a <<endl;
    } else {
        cout << 2*a-1 << endl;
        
    }
    return 0;
}