#include<iostream> using namespace std; int main() { double a,b,c,d,e; const double y=3.1415926; cin>>a>>b>>c>>d>>e; cout<<y*a*a<<endl; cout<<y*b*b<<endl; cout<<y*c*c<<endl; cout<<y*d*d<<endl; cout<<y*e*e<<endl; return 0; } #include<iostream> using namespace std; int main() { double a,b,c,d,e; const double y=3.1415926; cin>>a>>b>>c>>d>>e; cout<<y*a*a<<endl; cout<<y*b*b<<endl; cout<<y*c*c<<endl; cout<<y*d*d<<endl; cout<<y*e*e<<endl; return 0; }