#include<iostream>
using namespace std;

int main(){
  int A,B;
  cin >> A >> B;
  int ret=200;
  for(int sum=1;sum<=200;sum++){
    for(int a=0;a<=sum;a++){
      int b = sum - a;
      if((2*A-1)*b <= (201-2*A)*a && (2*A+1)*b > (199-2*A)*a &&
         (2*B-1)*a <= (201-2*B)*b && (2*B+1)*a > (199-2*B)*b)
        ret = min(ret,sum);
    }
  }
  cout << ret << endl;
  return 0;
}