#include <iostream>
using namespace std;

int gcd(int x, int y){
  if (y == 0){
    return x;
  }
  return gcd(y,x%y);
}

int main(){
  int x,y;
  cin >> x >> y;
  int ans = x + y - gcd(x,y) + 1;
  cout << ans << endl;
}

