use proconio::input;
fn main(){
    input!{
        mut a:usize,
        mut b:usize,

    }
    let mut ans=0;
    if a>b{
    	let c=b;
    	b=a;a=c;
    }
    ans+=a;
    b-=1;
    if a<b{
    	b=a;
    }
    ans+=b;
    print!("{}",ans);
}