Oktatás feladatmegoldások

using System;

namespace Oktatas
{
    class Program
    {
        static void Main(string[] args)
        {
            new Program().f913();
            // new Oktatas.Mistermind().run();
            // new Oktatas.Akasztofa().run();
        }

        void example1()
        {
            Console.WriteLine("Hello World!");
        }
        void example2()
        {
            Console.Write("Write your name:");
            string name = Console.ReadLine();
            Console.WriteLine("Hello " + name);
        }
        void example3()
        {
            int n1 = 1234;
            int n2 = 5678;
            int result = n1 + n2;
            Console.WriteLine("Sum is " + result);
        }
        void example4()
        {
            Console.Write("Enter a number:");
            int n1 = System.Convert.ToInt32(Console.ReadLine());
            Console.Write("Enter second number:");
            int n2 = System.Convert.ToInt32(Console.ReadLine());
            int result = n1 + n2;
            Console.WriteLine("Sum is " + result);
        }
        void example5()
        {
            Console.Write("Enter a number:");
            int n1 = System.Convert.ToInt32(Console.ReadLine());
            Console.Write("Enter second number:");
            int n2 = System.Convert.ToInt32(Console.ReadLine());
            if (n2 == 0)
            {
                Console.WriteLine("Cannot divide with zero");
            }
            else
            {
                int result = n1 / n2;
                Console.WriteLine("The result of the division is " + result);
            }
        }
        void f511()
        {
            Console.Write("Write your name: ");

            string name = Console.ReadLine();
            if (name.Length >= 3)
            {
                Console.WriteLine("Hello " + name);
            }
            else
            {
                Console.WriteLine("Name should be at least 3 characters long.");
            }
        }
        void f512()
        {
            Console.Write("Enter the password: ");
            string pass = Console.ReadLine();
            if (pass == "poi")
            {
                Console.WriteLine("The secret is: 'knowledge'");
            }
            else
            {
                Console.WriteLine("Wrong password!");
            }
        }
        void example6()
        {
            for (int i = 0; i < 10; i++)
            {
                Console.Write(" " + i);
            }
            Console.WriteLine();
        }
        void example7()
        {
            int i = 0;
            while (i < 10)
            {
                Console.Write(" " + i);
                i = i + 1;
            }
            Console.WriteLine();
        }
        void f523()
        {
            Console.Write("Meddig számoljunk? ");
            int n1 = System.Convert.ToInt32(Console.ReadLine());
            int i = 0;
            while (i < n1)
            {
                Console.Write(" " + i);
                i = i + 1;
            }
            Console.WriteLine();
        }
        void f524a()
        {
            Console.Write("Meddig számoljunk? ");
            ulong n1 = System.Convert.ToUInt64(Console.ReadLine());
            ulong i = 1;
            ulong sum = 0;
            while (i < n1)
            {
                i = i + 1;
                sum += i;
            }
            Console.WriteLine("A számok összege 1-től " + n1 + "-ig: " + sum);
        }
        void f524b()
        {
            Console.Write("Meddig számoljunk? ");
            ulong n1 = System.Convert.ToUInt64(Console.ReadLine());
            ulong i = 1;
            ulong sum = 0;
            while (sum <= n1)
            {
                i = i + 1;
                sum += i;
            }
            Console.WriteLine("A számok összege 1-től " + i + "-ig: " + sum);
        }
        void szamjatek_f525a()
        {
            Console.WriteLine("Gondolj egy számra 1 és 100 között!");
            int max = 101;
            int min = 0;
            while (true)
            {
                int mid = min + ((max - min) / 2);
                Console.WriteLine("Nagyobb mint " + mid + "? (I/N) ");
                string answer = Console.ReadLine();
                if ((answer == "I") || (answer == "i"))
                {
                    min = mid;
                }
                else
                {
                    max = mid + 1;
                }
                if ((min + 2) == max)
                {
                    Console.WriteLine("A(z) " + (min + 1) + " számra gondoltál.");
                    break;
                }
            }
        }
        void szamjatek_f525b()
        {
            Random rnd = new Random();
            int num = rnd.Next(100) + 1;
            Console.WriteLine("Gondoltam egy számra 1 és 100 között!");
            while (true)
            {
                Console.Write("Szerinted melyik számra gondoltam? ");
                int guess = System.Convert.ToInt32(Console.ReadLine());
                if (guess == num)
                {
                    Console.WriteLine("Igen, eltaláltad! A(z) " + num + " számra gondoltam.");
                    break;
                }
                else if (guess < num)
                {
                    Console.WriteLine(guess + "-nél(nál) nagyobb számra gondoltam");
                }
                else if (guess > num)
                {
                    Console.WriteLine(guess + "-nél(nál) kisebb számra gondoltam");
                }
            }
        }
        void f526()
        {
            int probalkozasokSzama = 0;
            while (true)
            {
                Console.Write("Enter the password: ");
                string pass = Console.ReadLine();
                if (pass == "poi")
                {
                    Console.WriteLine("The secret is: 'knowledge'");
                    break;
                }

                Console.WriteLine("Wrong password!");
                probalkozasokSzama += 1;
                if (probalkozasokSzama >= 3)
                {
                    Console.WriteLine("Too many failed tries. You are banned.");
                    break;
                }
            }
        }

        void example8()
        {
            char[] letters = { 'r', 'e', 'd' };
            Random rnd = new Random();
            for (int i = 0; i < 4; i++)
            {
                int index = rnd.Next(letters.Length);
                char letter = letters[index];
                Console.Write(letter);
            }
            Console.WriteLine();
        }
        void f612()
        {
            char[] mgh = "euioa".ToCharArray();
            char[] msh = "qwrtypsdfghjklzxcvbnm".ToCharArray();
            Random rnd = new Random();
            for(int a = 0; a < 12; a++)
            {
                int len = rnd.Next(7) + 3;
                for (int i = 0; i < len; i++)
                {
                    char[] letters = ((i % 2) == 0) ? msh : mgh;
                    int index = rnd.Next(letters.Length);
                    char letter = letters[index];
                    Console.Write(letter);
                }
                Console.WriteLine();
            }
        }
        public struct Vector
        {
            public int x;
            public int y;
        };
        void example9()
        {
            Vector[] vectors = new Vector[3];
            for (int i = 0; i < vectors.Length; i++)
            {
                Console.Write("X: ");
                vectors[i].x = System.Convert.ToInt32(Console.ReadLine());
                Console.Write("Y: ");
                vectors[i].y = System.Convert.ToInt32(Console.ReadLine());
                Console.WriteLine();
            }

            Vector result;
            result.x = 0;
            result.y = 0;
            foreach (Vector v in vectors)
            {
                result.x += v.x;
                result.y += v.y;
            }
            Console.WriteLine("Result is [" + result.x + ", " + result.y + "]");
        }
        struct Credential
        {
            public string name;
            public string password;
        };
        void example10()
        {
            Credential[] logins = new Credential[2];

            logins[0].name = "john";
            logins[0].password = "secure";

            logins[1].name = "bob";
            logins[1].password = "pass";

            Console.Write("Login: ");
            string nameEntered = Console.ReadLine();
            Console.Write("Password: ");
            string passwordEntered = Console.ReadLine();

            for (int i = 0; i < logins.Length; i++)
            {
                if ((nameEntered == logins[i].name) && (passwordEntered == logins[i].password))
                {
                    Console.WriteLine("Welcome " + nameEntered + "!");
                    return;
                }
            }
            Console.WriteLine("Permission denied!");
        }
        void example11()
        {
            Vector[] vectors = new Vector[3];
            for (int i = 0; i < vectors.Length; i++)
            {
                Console.Write("X: ");
                vectors[i].x = System.Convert.ToInt32(Console.ReadLine());
                Console.Write("Y: ");
                vectors[i].y = System.Convert.ToInt32(Console.ReadLine());
                Console.WriteLine();
            }
            Vector result = addVectors(vectors);
            Console.WriteLine("Result is [" + result.x + ", " + result.y + "]");
        }
        public Vector addVectors(Vector[] vectors)
        {
            Vector result;
            result.x = 0;
            result.y = 0;
            foreach (Vector v in vectors)
            {
                result.x += v.x;
                result.y += v.y;
            }
            return result;
        }

        public void f911()
        {
            Random rnd = new Random();
            for (int i=0; i<10; i++)
            {
                int n = rnd.Next(6) + 1;
                Console.WriteLine(n);
            }
        }
        public void f912()
        {
            Random rnd = new Random();
            long[] stat = new long[] {0,0,0,0,0,0};
            for (int i=0; i<10; i++)
            {
                int n = rnd.Next(6);
                stat[n] += 1;
            }
            for (int n=0; n<6; n++)
            {
                Console.WriteLine("" + (n+1) + " => " + stat[n]);
            }
        }
        public void f913()
        {
            Random rnd = new Random();
            int distance = 0;
            int maxDistance = 0;
            for (int i=0; i<100; i++)
            {
                int n = rnd.Next(6) + 1;
                if (n == 6)
                {
                    if (distance > maxDistance)
                    {
                        maxDistance = distance;
                    }
                    distance = 0;
                }
                else
                {
                    distance += 1;
                }
            }
            Console.WriteLine("max: " + maxDistance);
        }
        void f913a()
        {
            // Alternatív megoldás
            Random rnd = new Random();
            int lastSix = 0; // A legutóbbi hatos pozíciója
            int maxDist = 0; // Legnagyobb távolság
            for(int i=0; i<100; i++)
            {
                int n = rnd.Next(6) + 1;
                if (n == 6)
                {
                    int dist = i - lastSix; // Kiszámoljuk hatosok távolságát: a mostani és legutóbbi hatos pozíciójának különbse.
                    if (dist > maxDist)
                    {
                        // Ha a távolság nagyobb mint egy korábban rögzített maximális érték, akkor találtunk egy új maximumot.
                        maxDist = dist;
                    }
                    lastSix = i;
                }
            }
            Console.WriteLine(maxDist);
        }
    }
}