1011

// OK 1011 Timus https://acm.timus.ru/problem.aspx?space=1&num=1011

# include <iostream>
# include <cmath>
int main() {
    double p, q;
    std::ios_base::sync_with_stdio(false);
    std::cin >> p >> q;
    size_t p_int = p * 1000;
    if (p_int % 10 == 9) {
        p_int++;
    }
    size_t q_int = q * 1000;
    if (q_int % 10 == 9) {
        q_int++;
    }
    size_t i = 0;
    while (++i > 0) {
        for (auto j = std::max(static_cast<int32_t>(p * i / 1000) - 2, 0); j <= i; j++) {
            if (j * 100'000 > i * p_int && j * 100'000 < i * q_int) {
                std::cout << i << '\n';
                return 0;
            } else if (j * 100'000 > i * q_int) {
                break;
            }
        }
    }
    return 0;
}