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  1. using static System.Console;
  2. using static System.Math;
  3. using System.Globalization;
  4.  
  5. namespace Uri_CSharp {
  6.     public class URI {
  7.         public static void Main(string[] args) {
  8. 			if (double.TryParse(ReadLine(), out var raio)) {
  9. 				double area = Pow(raio, 2) * 3.14159;
  10. 				WriteLine(area.ToString("F4", new CultureInfo("pt-BR")));
  11. 			}
  12. 		}
  13.     }
  14. }
  15.  
  16. //https://pt.stackoverflow.com/q/141112/101
Success #stdin #stdout 0.02s 15996KB
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https://ideone.com/HSFIaw
language:
C# (gmcs 5.20.1)
created:
4 years ago
visibility:
public

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