#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
using ll = long long ;
using P = pair<int,int> ;
using pll = pair<long long,long long>;
constexpr int INF = 1e9;
constexpr long long LINF = 1e17;
constexpr int MOD = 1000000007;

int main(){
    int a,b;
    cin >> a >> b;
    if(a==b) cout << a+b-1 << endl;
    else cout << min(a,b)*2 << endl;
    return 0;
}