题解 | #牛牛的圆#
牛牛的圆
https://www.nowcoder.com/practice/75a202e826d048a39824ec694b5ce7e3
using System; public class Program { public static void Main() { string s = Console.ReadLine(); Console.WriteLine(3.14*Math.Pow(Convert.ToInt32(s), 2)); } }
牛牛的圆
https://www.nowcoder.com/practice/75a202e826d048a39824ec694b5ce7e3
using System; public class Program { public static void Main() { string s = Console.ReadLine(); Console.WriteLine(3.14*Math.Pow(Convert.ToInt32(s), 2)); } }
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