#include<iostream> #include<iomanip> using namespace std; int main() { int a,b; cin>>a>>b; if(20000%a*b*b*3.14==0){ cout<<20000/(a*b*b*3.14)<<fixed<<setprecision(0); } else{ cout<<20000/(a*b*b*3.14)+1<<fixed<<setprecision(0); } return 0; }