题解 | #牛牛的球#
牛牛的球
https://www.nowcoder.com/practice/203ca3114f8845a9bbd673bae6c5dd2b
using System;
public class Program {
public static void Main() {
int r = int.Parse(Console.ReadLine());
Console.WriteLine(3.14*4/3*Math.Pow(r, 3));
}
}
