using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        new UnitTest().TestFizzBuzz();

        for (int i = 0; i <100; i++)

        {

            Console.WriteLine(FizzBuzz.GetFizzBuzz(i));

        }

    }

    public class UnitTest

    {

        List<(int eval, string expectedResult)> _testCases;

        public UnitTest()

        {

            _testCases = new List<(int eval, string expectedResult)>()

            {

                (0, "0"),

                (1, "1"),

                (3, "Fizz"),

                (5, "Buzz"),

                (15, "FizzBuzz")

            };

        }

        public void TestFizzBuzz()

        {

            foreach(var testCase in _testCases)

            {

                var testStatus = "Failed";

                var result = FizzBuzz.GetFizzBuzz(testCase.eval);

                if(testCase.expectedResult == result)

                {

                    testStatus = "Passed";

                    Console.WriteLine($"{testStatus}: {testCase.eval} Returned: <{result}> Expected: <{testCase.expectedResult}>");

                }

            }

        }                   

    }

    public static class FizzBuzz

    {

        public static string GetFizzBuzz(int i)

        {

            if (i == 0)

            {

                return i.ToString();

            }

            return (i % 3, i % 5) switch

            {

                (0, 0) => "FizzBuzz",

                (0, _) => "Fizz",

                (_, 0) => "Buzz",

                (_, _) => i.ToString()

            };

        }

    }

}