#include<stdio.h>
#include<math.h>
int main()
{
	float r = 0.0;  
	float h = 0.0; 
	scanf("%f%f", &h , &r);     
	double sum = 3.14 * h * (r * r);     
	double count = 10000 / sum ;     
	printf("%d", (int)count+1);  
	return 0; 
}