#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, n) for(int i=(0+s); i < (n+s); i++)

//pair<T, T>-> P<T>
template<class T> using P = pair<T, T>;
template<class T> struct item {T A, B, C;};

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int L, R;
    cin >> L >> R;
    int l_cnt=0, r_cnt=0;
    if(L<=295)l_cnt=0;
    else if(L<=416) l_cnt=1;
    else l_cnt=2;

    if(R<=295)r_cnt=0; 
    else if(R<=416) r_cnt=1;
    else r_cnt=2;

    cout << r_cnt-l_cnt << endl;
    return 0;
}