import java.util.Scanner;

public class _1011 {
    public static void main(String[] args) throws Exception {
        Scanner s = new Scanner(System.in);
        double p, q;
        p = Double.parseDouble(s.nextLine());
        q = Double.parseDouble(s.nextLine());
        p /= 100;
        q /= 100;
        answer(p, q, 1, 1, 0);
    }

    public static void answer(double p, double q, double m, double mp, long n) {
        long t = (long) (m / q) + 1;
        if (p * t < mp) {
            System.out.println(n + t);
        } else {
            answer(p, q, 1 - q * t + m, 1 - p * t + mp, n + t);
        }
    }
}