#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define ALL(a) (a).begin(), (a).end()
#define Yes cout << "Yes" << endl
#define No cout << "No" << endl
#define endl '\n'

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int L, R;
    cin >> L >> R;
    int ans = 0;
    int n = L;
    while (n < R) {
        n++;
        if (n == 296)
            ans++;
        if (n == 417)
            ans++;
    }
    cout << ans << endl;
}