#include <bits/stdc++.h>
using namespace std;
#define modulo 1000000007
#define mod(mod_x) ((((long long)mod_x+modulo))%modulo)
#define Inf 1000000000


int main(){
	
	int A,B;
	cin>>A>>B;
	
	if(A>B)swap(A,B);
	
	if(A==B){
		cout<<A+B-1<<endl;
	}
	else{
		cout<<A + A<<endl;
	}
	
	return 0;
}