#include<stdio.h>
#include <math.h>
int main()
{
	int a = 1;
	float h, r, v, b;
	scanf("%f %f", &h, &r);
	r = r / 100;
	h = h / 100;
	v = pow(r, 2) * 3.14 * h;
	b = v;
	while (b < 0.02)
	{
		b = b + v;
		a++;
	}
	printf("%d", a);
	return 0;
}