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