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

using ll = int64_t;

ll L, R;

void input() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> L >> R;
}

void solve() {
    ll l, r;
    if (L <= 295) l = 0;
    else if (L <= 416) l = 1;
    else l = 2;
    if (R <= 295) r = 0;
    else if (R <= 416) r = 1;
    else r = 2;
    cout << r-l << endl;
}

int main() {
    input();
    solve();
    return 0;
}

/* 考察

*/