#include<bits/stdc++.h>
using namespace std;
int h,r,pai=3.14,sum=0,tong=0,ch=0;
int main(){
	cin>>h>>r;
	tong=h*pai*r*r;
	sum=20000/tong;
	ch=20000%tong;
	if(ch=0){
		cout<<sum;
		cout<<endl;
		return 0;
	}else{
		sum++;
		cout<<sum;
		cout<<endl;
		return 0;
	}
}

我嘟CPU给干废了