#include <stdio.h>

int main()
{
    double h = 0, r = 0;
    double sum = 0;
    scanf("%lf %lf", &h, &r);
    int i = 0;
    for (i = 1;; i++)
    {
        sum += 3.14 * h * r * r;
        if (sum > 10000.0)
        {
            break;
        }
    }
    printf("%d\n", i);
    return 0;
}