#include<iostream> using namespace std; int main(){ int a,b,c,d,e=1,3,5,7,9; cout<<a**2*3.1415926<<endl<<b**2*3.1415926<<endl<<c**2*3.1415926<<endl<<d**2*3.1415926<<endl<<e**2*3.1415926; return 0; }