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