#include <iostream>
using namespace std;
int main(){
    long long h,r;
    cin>>h>>r;
    double t=3.14*r*r*h;
    if(t>=20000){
        cout<<1;
    }else{
            if(20000%((int)t+1)==0) {
            cout<<(int)(20000/t);
        }else{
            cout<<(int)(20000/t+1);
        } 
    }
    return 0;
}