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

using Int = long long;
const char newl = '\n';

template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}
template<typename T> void drop(const T &x){cout<<x<<endl;exit(0);}
template<typename T=int>
vector<T> read(size_t n){
  vector<T> ts(n);
  for(size_t i=0;i<n;i++) cin>>ts[i];
  return ts;
}


struct Precision{
  Precision(){
    cout<<fixed<<setprecision(12);
  }
}precision_beet;

//INSERT ABOVE HERE
signed main(){
  cin.tie(0);
  ios::sync_with_stdio(0);
  using D = double;
  D r,R;
  cin>>r>>R;
  D pi=asin(1)*2;
  D th=2*pi-acos((R*R+R*R-4*r*r)/(2*R*R));
  cout<<th<<newl;
  cout<<th/2*((R+r)*(R+r)-(R-r)*(R-r))+pi*r*r<<newl;
  return 0;
}