#include<stdio.h>
#define PI 3.14
int main(){
	int h,r;
	int V;
	int count=1;
	scanf("%d %d",&h,&r);
	V=h*PI*r*r;
	int v=V;
	
	if(V<=20000){
		while(V<=20000){
			count++;
			V=V+v;
		}
	}else {
		count=1;
	}
	
	
	
	printf("%d",count);

	return 0;
	
	
	
}