#include <bits/stdc++.h>
using namespace std;

int main() {
  int l,r;cin>>l>>r;
  if(l<=295){
    if(r>=296){
      if(r>=417){
        cout<<2<<endl;
      }
      else{
        cout<<1<<endl;
      }
    }
    else{
      cout<<0<<endl;
    }
  }
  else if(l<=416){
    if(r>=417){
      cout<<1<<endl;
    }
    else cout<<0<<endl;
  }
  else cout<<0<<endl;
}