非正常答案

#include <bits/stdc++.h> 
using namespace std; 
const double PI = 3.1415926; 
int main() { 
    
   double radius; 
   cin >> radius; 
   double volume = (4.0 / 3) * PI * radius * radius * radius; 
   cout << fixed << setprecision(4) << volume << endl; 

   return 0; 
}