#include <iostream>
int main(){
	int A,B;
	std::cin>>A>>B;
	if(A>B){
		std::cout<<B*2<<std::endl;
	}else if(A=B){
		std::cout<<A*2-1<<std::endl;
	}else{
		std::cout<<A*2<<std::endl;
	}
	return 0;
}