#include<bits/stdc++.h>
#define rep(i, x) for(ll i = 0; i < x; i++)
#define rep2(i, x) for(ll i = 1; i <= x; i++)
#define all(a) (a).begin(),(a).end()
using ll = long long;
using ld = long double;
using namespace std;
signed main() {
	ll n, m; cin >> n >> m;
	if (n == m) { cout << n + m - 1 << endl; }
	else { cout << min(n, m) * 2 << endl; }
	return 0;
}