#55667: c++ 題目給的平方吋不夠精準要自己算
#include <bits/stdc++.h>
using namespace std;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
map <int,double>m={
{6,3*3*3.14159},
{9,4.5*4.5*3.14159},
{12,6*6*3.14159},
{16,8*8*3.14159},
{20,10*10*3.14159},
};
int t1;
while(cin>>t1){
int size;
double total1=0.0,total2=0.0;
while(t1--){
cin>>size;
total1+=m[size];
}
int t2;
cin>>t2;
while(t2--){
cin>>size;
total2+=m[size];
}
cout<<fixed<<setprecision(2)<<abs(total1-total2)<<"\n";}
return 0;
}