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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.Threading.Tasks;
  6.  
  7. namespace ConsoleApplication13
  8. {
  9.     class Program
  10.     {
  11.         static void Main(string[] args)
  12.         {
  13.             string input = Console.ReadLine();
  14.  
  15.             int bufor = 0;
  16.             double d = 0.0, r = 0.0;
  17.             double result=0.0;
  18.  
  19.             for (int i = 0; i < input.Length; i++)
  20.             {
  21.                 if (input[i] == ' ')
  22.                 {
  23.                     bufor = i + 1;
  24.  
  25.                     r = double.Parse(input.Substring(0, bufor).Replace('.', ','));
  26.                     break;   
  27.                 }
  28.  
  29.             }
  30.             d = double.Parse(input.Substring(bufor, input.Length - bufor).Replace('.', ','));
  31.  
  32.             result = (((r*r)-((d*d)*0.25))* 3.141592654);
  33.  
  34.             Console.WriteLine(Math.Round(result,2).ToString().Replace(',','.'));
  35.         }
  36.     }
  37. }
  38.  
Success #stdin #stdout 0s 29664KB
comments (?)
stdin 
10.24 9.4214
stdout 
-6968118081.04
https://ideone.com/9tbafo
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
public

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