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