// 素敵な日
#include <bits/stdc++.h>
#define rep(i, n) for(int i=0; i<(int)(n); ++i)
using namespace std;
using ll = long long;
using ull = unsigned long long;

int main(){
    int A, B;
    cin >> A >> B;
    int ans;
    if(A == B) ans = A*2-1;
    else{
        ans = min(A, B);
        ans *= 2;
    }
    cout << ans << endl;
    return 0;
}