using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace RS_2020_01_23
{
    class Program
    {
        static void Main(string[] args)
        {
            /*
            YL01();
            Console.ReadKey();
            YL02();
            Console.ReadKey();
            YL03();
            Console.ReadKey();
            YL04();
            Console.ReadKey();
            YL05();
            Console.ReadKey();
            YL06();
            Console.ReadKey();
            YL07();
            Console.ReadKey();
            YL08();
            Console.ReadKey();
            YL09();
            Console.ReadKey();
            YL10();
            Console.ReadKey();
            */
            YL11();
            Console.ReadKey();
            YL12();
            Console.ReadKey();
            YL13();
            Console.ReadKey();
            YL14();
            Console.ReadKey();
        }
        static void YL01()
        {
            int esimene, mitu, samm, kokku;
            Console.WriteLine("Mis on esimene arv?: ");
            esimene = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Mitu arvu sisestame?: ");
            mitu = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Mitme sammu kaupa lisame?: ");
            samm = Convert.ToInt32(Console.ReadLine());
            for (kokku = 0; kokku <= mitu; kokku++)
            {
                Console.WriteLine(esimene + samm);
            }
        }
        static void YL02()
        {
            int esimene = 2, samm = 3, piir = 1000;
            int summa = 0, number = esimene;
            string mark = "";
            do
            {
                Console.Write(mark + number);
                summa += number;
                number += samm;
                mark = "+";
            } while (summa <= piir);
            Console.WriteLine("=" + summa);
        }
        static void YL03()
        {
            int mitu, summa = 0, n1 = 0, n2 = 1, n3;
            Console.Write("Fibonacci jada pikkus:");
            mitu = Convert.ToInt32(Console.ReadLine());
            string t = n1 + " + " + n2;
            summa = n1 + n2;
            for (int i = 2; i <= mitu; i++)
            {
                n3 = n1 + n2;
                t = t + " + " + n3;
                summa += n3;
                n1 = n2;
                n2 = n3;
            }
            t = t + " = " + summa;
            Console.WriteLine(t);
        }
        static int Fib(int n)
        {
            if (n == 0) return 0;
            else if (n == 1) return 1;
            else return (Fib(n - 2) + Fib(n - 1));
        }
        static void YL04()
        {
            int mitu, summa = 0;
            Console.Write("Fibonacci jada pikkus -->");
            mitu = Convert.ToInt32(Console.ReadLine());
            int[] mas = new int[mitu];
            mas[0] = 0;
            mas[1] = 1;
            for (int i = 2; i < mitu; i++)
                mas[i] = mas[i - 2] + mas[i - 1];
            string t = "";
            for (int i = 0; i < mitu; i++)
            {
                if (i > 0) t += "+";
                t += mas[i];
                summa += mas[i];
            }
            t = t + "=" + summa;
            Console.WriteLine(t);
        }
        static void YL05()
        {
            int esimene = 2, samm = 3, piir = 1000;
            int summa = 0, number = esimene;
            string mark = "";
            do
            {
                Console.Write(mark + number);
                summa += number;
                number += samm;
                mark = "+";
            } while (summa <= piir);
            Console.WriteLine("=" + summa);
        }
        static void YL06()
        {
            Random rn = new Random();
            int suurus = 60, alg = 10, lopp = 50;
            int[] mas = new int[suurus];
            for (int i = 0; i < suurus; i++)
                mas[i] = rn.Next(alg, lopp + 1);
            for (int i = 0; i < suurus; i++)
                Console.Write(" " + mas[i]);
            Console.WriteLine();
            int minv = mas[0];
            int maxv = mas[0];
        }
        static void YL07()
        {
            // variant A
            Random rn = new Random();
            int suurus = 20, algus = 10, lopp = 20;
            int[] mas = new int[suurus];
            for (int i = 0; i < suurus; i++)
                mas[i] = rn.Next(algus, lopp + 1);
            for (int i = 0; i < suurus; i++)
                Console.Write(" " + mas[i]);
            Console.WriteLine();
            int minv = mas[0];
            for (int i = 1; i < suurus; i++)
                if (mas[i] < minv) minv = mas[i];
            Console.WriteLine("min = " + minv);
            int koht = 0, kordus = 0;
            for (int i = 1; i < suurus; i++)
            {
                if (mas[i] == minv)
                {
                    kordus++;
                    if (koht == 0) koht = i + 1;
                }
            }
            Console.WriteLine("esimene koht on: " + koht);
            Console.WriteLine("kordusi on: " + kordus);
            koht = 0; kordus = 0;
            for (int i = suurus - 1; i >= 0; i--)
            {
                if (mas[i] == minv)
                {
                    kordus++;
                    koht = i + 1;
                }
            }
            Console.WriteLine("esimene koht on: " + koht);
            Console.WriteLine("kordusi on: " + kordus);
            // variant B
            koht = suurus; kordus = 1;
            for (int i = suurus - 2; i >= 0; i--)
            {
                if (mas[i] == mas[koht - 1])
                {
                    koht = i + 1;
                    kordus = 1;
                }
                else if (mas[i] == mas[koht - 1])
                {
                    koht = i + 1;
                    kordus++;
                }
            }
            Console.WriteLine("esimene koht on: " + koht);
            Console.WriteLine("kordusi on: " + kordus);
        }
        static void YL08()
        {
            Random rn = new Random();
            int n1 = 1, n2 = 20, mitu = 10, juhuarv;
            //variant A
            int[] arvud = new int[mitu];
            for (int i = 0; i < mitu; i++)
            {
                juhuarv = rn.Next(n1, n2 + 1);
                bool tunnus = false;
                do
                {
                    juhuarv = rn.Next(n1, n2 + 1);
                    for (int j = 0; j < i; j++)
                        if (juhuarv == arvud[i]) tunnus = true;
                } while (tunnus == true);
                arvud[i] = juhuarv;
                Console.Write(" " + juhuarv);
            }
            //variant B
            bool[] numbrid = new bool[n2 + 1];
            for (int n = n1; n < n2; n++)
                numbrid[n] = false;
            for (int i = 0; i < mitu; i++)
            {
                do
                {
                    juhuarv = rn.Next(n1, n2 + 1);
                } while (numbrid[juhuarv] == true);
                numbrid[juhuarv] = true;
                Console.Write(" " + juhuarv);
            }
            Console.WriteLine();
            Console.WriteLine("järjestatud");
            for (int n = n1; n <= n2; n++)
                if (numbrid[n])
                    Console.Write(" " + n);
            Console.WriteLine();
        }
        static void YL09()
        {
            int[,] kt = new int[16, 16];
            for (int rn = 0; rn < 16; rn++)
                for (int vn = 0; vn < 16; vn++)
                    kt[rn, vn] = rn * vn;

            for (int rn = 0; rn < 16; rn++)
            {
                for (int vn = 0; vn < 16; vn++)
                    Console.Write("{0, 5}", kt[rn, vn]);
                Console.WriteLine();
            }
        }
        static void YL10()
        {
            int[,] kt = new int[11, 11];
            Random r = new Random();

            for (int rn = 1; rn < 11; rn++)
                for (int vn = 1; vn < 11; vn++)
                    kt[rn, vn] = r.Next(10, 30);
            for (int rn = 1; rn < 11; rn++)
                for (int vn = 1; vn < 11; vn++)
                    kt[rn, 0] += kt[rn, vn];
            for (int vn = 1; vn < 11; vn++)
                for (int rn = 1; rn < 11; rn++)
                    kt[0, vn] += kt[rn, vn];
            for (int rn = 0; rn < 11; rn++)
            {
                for (int vn = 0; vn < 11; vn++)
                    Console.Write("{0,5}", kt[rn, vn]);
                Console.WriteLine();
            }
        }
        static void YL11()
        {
            //Variant 1
            int[,] tabel = new int[4, 6];

            for (int rn = 0; rn < 4; rn++)
                for (int vn = 0; vn < 6; vn++)
                {
                    tabel[rn, vn] = 1;
                }
            for (int rn = 1; rn < 4; rn++)
                for (int vn = 1; vn < 6; vn++)
                    tabel[rn, vn] = tabel[rn, vn - 1] + tabel[rn - 1, vn];
            for (int rn = 0; rn < 4; rn++)
            {
                for (int vn = 0; vn < 6; vn++)
                    Console.Write("{0,4}", tabel[rn, vn]);
                Console.WriteLine();
            }
        }
        static void YL12()
        {
            //Variant 2
            int kx = 6, ky = 4;
            int[,] tabel = new int[ky, kx];

            for (int rn = 0; rn < ky; rn++)
                for (int vn = 0; vn < kx; vn++)
                    if (rn == 0 || vn == 0) tabel[rn, vn] = 1;
                    else tabel[rn, vn] = tabel[rn - 1, vn] + tabel[rn, vn - 1];
            for (int rn = 0; rn < ky; rn++)
            {
                for (int vn = 0; vn < kx; vn++)
                    Console.Write("{0,4}", tabel[rn, vn]);
                Console.WriteLine();
            }
        }
        static void YL13()
        {
            int kx = 6, ky = 4;
            int[,] tabel = new int[ky, kx];
            int arv = 0;
            for (int rn = 0; rn < ky; rn++)
                if (rn % 2 == 0)
                    for (int vn = 0; vn < kx; vn++)
                        tabel[rn, vn] = arv++;
                else
                    for (int vn = kx - 1; vn >= 0; vn--)
                        tabel[rn, vn] = arv++;
            for (int rn = 0; rn < ky; rn++)
            {
                for (int vn = 0; vn < kx; vn++)
                    Console.Write("{0,4}", tabel[rn, vn]);
                Console.WriteLine();
            }
        }
        static void YL14()
        {
            int[,] kt = new int[4, 6];
            for (int rn = 0; rn < 4; rn++)
            {
                if (rn > 0) kt[rn, 0] = kt[rn - 1, 0] + rn + 1;
                for (int vn = 1; vn < 6; vn++)
                {
                    int lisa = rn + vn;
                    if (lisa > 4) lisa = 9 - lisa;
                    kt[rn, vn] = kt[rn, vn - 1] + lisa;
                }
            }
            for (int rn = 0; rn < 4; rn++)
            {
                for (int vn = 0; vn < 6; vn++)
                    Console.Write("{0,4}", kt[rn, vn]);
                Console.WriteLine();
            }
        }
    }
}