#include <bits/stdc++.h>
using namespace std;
struct point{double x;double y;};
int i,j,k,count1=0,count2=0;

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