#include<bits/stdc++.h> using namespace std; int h,r,a; int main(){ cin>>h>>r; a=20000/(3.14rr*h)+1; cout<<a; return 0; }

#include<bits/stdc++.h>
using namespace std;
int h,r,a;
int main(){
	cin>>h>>r;
	a=20000/(3.14*r*r*h)+1;
	cout<<a;
	return 0;
}