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