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

#include <bits/stdc++.h> using namespace std;

int main(){ int h,r; cin>>h>>r; double v=3.14rrh; int s=ceil(201000/v); cout<<s<<endl; return 0; }