CoderByte-C#-Quiz

using System;

namespace Quiz
{
    class Program
    {

        public static string FirstCharToUpper(string str)
        {
            char[] array = str.ToCharArray();

            if (array.Length >= 1)
            {
                if (char.IsLower(array[0]))
                {
                    array[0] = char.ToUpper(array[0]);
                }
            }


            for (int i = 1; i < array.Length; i++)
            {
                if (array[i - 1] == ' ')
                {
                    if (char.IsLower(array[i]))
                    {
                        array[i] = char.ToUpper(array[i]);
                    }
                }
            }
            return new string(array);
        }


        public static string countMinutes(String str)
        {
            string[] times = str.Split("-");

            int minutes = 0;

            string dayNight1 = times[0].Substring(times[0].Length - 2);

            string dayNight2 = times[1].Substring(times[1].Length - 2);

            if (!dayNight1.Equals(dayNight2))
                minutes = 720;

            string hour1 = times[0].Substring(0, times[0].IndexOf(":"));

            string hour2 = times[1].Substring(0, times[1].IndexOf(":"));

            string minute1 = times[0].Substring(times[0].IndexOf(":") + 1, 2);

            string minute2 = times[1].Substring(times[1].IndexOf(":") + 1, 2);

            int time1 = Int32.Parse(hour1) * 60 + Int32.Parse(minute1);

            int time2 = Int32.Parse(hour2) * 60 + Int32.Parse(minute2);

            minutes += time2 - time1;

            if (minutes == -1)
                return (1440 - minutes).ToString();
            else if (minutes < 0)
                return (1440 + minutes).ToString();

            return minutes.ToString();
        }


        public static int CombinatoricsChallenge(int num)
        {
            if (num <= 1)
            {
                return num;
            }
            return CombinatoricsChallenge(num-1) + CombinatoricsChallenge(num-2);
        }

        public static int CountWays(int s)
        {
            return CombinatoricsChallenge(s+1);
        }

        static void Main(string[] args)
        {
            //var x = FirstCharToUpper("hello world");
            //var x = countMinutes("12:30pm-12:00am");
            var x = CountWays(4);

        }
    }
}