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

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