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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int L, R;
    cin >> L >> R;
    int lang[3] = {0, 295, 416};
    cout << lower_bound(lang, lang + 3, R) - lower_bound(lang, lang + 3, L) << endl;
}