using System;

public class Program

{

    public static void Main()

    {

        int similationCount = 1000000;

        Random rand = new Random();

        int minNumberOfGuarantees = 16;

        int maxNumberOfGuarantees = 30;

        for (int numberOfGuarantees = minNumberOfGuarantees; numberOfGuarantees<=maxNumberOfGuarantees; numberOfGuarantees++)

        {

            int[] countsOfWeaponA = new int[numberOfGuarantees + 1];

​

            for (int count =0; count < similationCount; count++)

            {

                int weaponA = 0;

                int weaponB = 0;

                int otherWeapon = 0;

​

                bool enteringFirstGuarantee = true;

                for (int i =0; i < numberOfGuarantees; i++)

                {

                    if(enteringFirstGuarantee)

                    {

                        bool isUpWeapon = FirstGuarantee(ref weaponA, ref weaponB, ref otherWeapon, ref rand);

                        if (!isUpWeapon) {

                            enteringFirstGuarantee = false;

                        }

​

                    } else {

                        SecondGuarantee(ref weaponA, ref weaponB, ref rand);

                        enteringFirstGuarantee = true;

                    }

                }

                countsOfWeaponA[weaponA] ++;

            }

            decimal moreThanOnePercentage = 100-Convert.ToDecimal(countsOfWeaponA[0])*100/similationCount;

            Console.WriteLine("触发{0}次保底时", numberOfGuarantees);

            Console.WriteLine("抽到1把或以上：{0:0.00}%", moreThanOnePercentage);

            if(numberOfGuarantees >= 5) {

                decimal lessThanFivePercentage = Convert.ToDecimal(countsOfWeaponA[0] + countsOfWeaponA[1] + countsOfWeaponA[2] + countsOfWeaponA[3] + countsOfWeaponA[4]);

                lessThanFivePercentage = 100-lessThanFivePercentage*100/similationCount;

                Console.WriteLine("抽到5把或以上：{0:0.00}%\n\r",lessThanFivePercentage);

            }

/*

            for(int weaponANumber = 0; weaponANumber < countsOfWeaponA.Length; weaponANumber++)

            {

                Console.WriteLine("抽到 {0} 把狙击武器: {1}", weaponANumber, countsOfWeaponA[weaponANumber]);

            }

            for(int weaponANumber = 0; weaponANumber < countsOfWeaponA.Length; weaponANumber++)

            {

                Console.WriteLine("{0}", countsOfWeaponA[weaponANumber]);

            }

            */

        }

    }

    private static bool FirstGuarantee(ref int weaponA, ref int weaponB, ref int otherWeapon, ref Random rand){

        bool isUpWeapon = false;

        double weaponAProbability = 37.5d;

        double weaponBProbability = 37.5d;

        //double otherWeaponProbability = 25d;

        int chance = rand.Next(1, 101);

        if (chance <= weaponAProbability)

        {

            weaponA++;

            isUpWeapon = true;

        } 

        else if (chance <= weaponAProbability + weaponBProbability)

        {

            weaponB++;

            isUpWeapon = true;

        }

        else

        {

            otherWeapon++;

            isUpWeapon = false;

        }

        return isUpWeapon;

    }

    private static void SecondGuarantee(ref int weaponA, ref int weaponB, ref Random rand) {        

        double weaponAProbability = 50d;

        //double weaponBProbability = 50d;

        int chance = rand.Next(1, 101);

        if (chance <= weaponAProbability)

        {

            weaponA++;

        } 

        else

        {

            weaponB++;

        }

    }

}