#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cmath>

#define rep(i,n) for(i=0; i<n; ++i)
#define in(a) cin >> a
#define out(a,b) cout << a << b
using namespace std;
using lint = long long;

int main(void){
    int i, j;
    int n, m;
    in(n);
    in(m);
    if(n==m)    out(n+m,endl);
    else{
        int x, y;
        x=min(n,m); y=max(n,m);
        out(n+m+y-(x+1),endl);
    }
    return 0;
}