/* -*- coding: utf-8 -*-
 *
 * 1860.cc:  No.1860 Magnets - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int a, b;
  scanf("%d%d", &a, &b);

  int x = (a == b) ? a + b : max(a, b) * 2 - 1;
  printf("%d\n", x);
  return 0;
}