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

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