fork download
copy 
  1. #include <iostream>
  2. #include<cmath>
  3. #include<iomanip>
  4.  
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9.     const double PI = 3.141592654;
  10.     double d,r;
  11.     cin>>d>>r;
  12.  
  13.     std::cout.precision(2);
  14.     std::cout << std::fixed << std::showpoint << PI*(r*r-0.25*d*d);
  15.     return 0;
  16. }
  17.  
Success #stdin #stdout 0s 4240KB
comments (?)
stdin
copy 
1000 1500
stdout
copy 
6283185.31
https://ideone.com/oIYxGV
problem ETI06F1, based on SPOJ submission 22165346 (C++ 4.3.2), 2018-08-16 17:37:47
language:
C++ 4.3.2 (gcc-4.3.2)
created:
5 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!