题解 | #牛牛的并联电路#

using System;
public class Program {
    public static void Main() {
        string[] s = Console.ReadLine().Split(" ");
        double[] d = 字符串数组转浮点数数组(s);
        Console.WriteLine((d[0]*d[1])/(d[0]+d[1]));
    }

    public static double[] 字符串数组转浮点数数组(string[] arr)
    {
        double[] d = new double[arr.Length];
        for(int i = 0;i < arr.Length;i++)
        {
            d[i] = double.Parse(arr[i]);
        }
        return d;
    }
}