#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define all(x) (x).begin(), (x).end()
#define oke cout << "Yes" << endl;
#define dame cout << "No" << endl;
using P = pair<int, int>;


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


}