#include using namespace std; #define all(x) x.begin(),x.end() #define rep(i, n) for (int i = 0; i < (int)(n); i++) template inline bool chmax(T&a,T b){if(a inline bool chmin(T&a,T b){if(a>b){a=b;return 1;}return 0;} using ll = long long; int a,b; int main(){ ios::sync_with_stdio(false); cin.tie(0); cin >> a >> b; cout << (a==b ? a*2-1 :min(a,b)*2) << endl; }