#include <bits/stdc++.h> using namespace std; int main(){ double p=3.1415926; long long a=1,b=3,c=5,d=7,e=9; cout<<a*a*p<<endl; cout<<b*b*p<<endl; cout<<c*c*p<<endl; cout<<d*d*p<<endl; cout<<e*e*p<<endl; return 0; }