#include <bits/stdc++.h>

using namespace std;

int main() {
    int L, R;
    cin >> L >> R;
    int 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;
    return 0;
}