#include<bits/stdc++.h> using namespace std; int main() { double r,d,c,s; const double PI=3.14159; cin>>r; d=2r; c=2PIr; s=PIrr; d=round(d10000)/10000; c=round(c10000)/10000; s=round(s10000)/10000; printf("%.4f %.4f %.4f\n",d,c,s);

return 0;

}