#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
  int x, y;
  cin >> x >> y;
  x = abs(x);
  y = abs(y);
  if (x == 0 && y == 0)
  {
    cout << 0 << endl;
  }
  else if (x == 0 || y == 0 || x == y)
  {
    cout << 1 << endl;
  }
  else
  {
    cout << 2 << endl;
  }
}