using System;

public class Program

{

    public static void Main()

    {

        int magicDamage = 1870;

        double heroBase = 0.25;

        double corrosiveSkin = 0.25;

        double nullField = 0.2;

        double pipe =  0.3;

        double pipeAura = 0.1;

        double totalMagicResistance = 1 - ((1 - heroBase) * (1 - corrosiveSkin) * (1 - nullField) * (1 - pipe) * (1 - pipeAura)); // * (1 + for each resistance reduction) 

        double actualDamage = magicDamage * (1 - totalMagicResistance);

        double damageWithoutExtraResist = magicDamage * (1 - heroBase);

​

        Console.WriteLine(string.Format("Viper's total magic resistance with rubick: {0}%\nTakes {1} damage from {2} magic damage",

                                        totalMagicResistance * 100, (int)actualDamage, magicDamage));

        Console.WriteLine(string.Format("Without extra resists viper would take: {0} damage", (int)damageWithoutExtraResist));

​

    }

}