using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SSS1 {
    class Program {
        static void Main(string[] args)
        {
            task1(); Console.ReadKey();
            task2(); Console.ReadKey();
            task3(); Console.ReadKey();
            task4(); Console.ReadKey(); task5(); Console.ReadKey();

        }


        static void task1()
        {
            Console.WriteLine("task 1");
            int n; int q = 1;
            n = int.Parse(Console.ReadLine());
            string r = "";
            for (int i = 0; i < n; i++) {
                r += "#";
                Console.WriteLine(r);

            }
        }

        static void task2()
        {
            Console.WriteLine("task 2");
            for (int i = 1; i < 101; i++) {
                string r = string.Format("{0}{1}{2}", i, i % 3 == 0 ? "Fizz": "", i % 5 == 0 ? "Buzz": "");
                Console.WriteLine(r);
            }
        }

        static void task3()
        {
            Random Aist = new Random();
            Console.WriteLine("task3");
            int[] a = new int[] {Aist.Next() % 500, Aist.Next() % 500, Aist.Next() % 500, Aist.Next() % 500 };
            int[] b = reverseArray(a);
            for (int i = 0; i < 4; i++) {
                Console.WriteLine(string.Format("{0} {1}", a[i], b[i]));
            }
            reverseArrayInPlace(ref a);
            for (int i = 0; i < 4; i++) {
                Console.WriteLine(string.Format("{0}", a[i]));
            }
        }

        static int[] reverseArray(int[] arra)
        {
            int[] reverse = new int[arra.Length];
            for (int i = 0; i < arra.Length; i++) {
                reverse[i] = arra[arra.Length - i - 1];
            }
            return reverse;
        }

        static void reverseArrayInPlace(ref int[] arra)
        {
            int q;
            for (int i = 0; i < arra.Length / 2; i++) {
                q = arra[i];
                arra[i] = arra[arra.Length - i -1 ];
                arra[arra.Length - 1 -i] = q;
            }
        }

        static void task4()
        {
            Random Aist = new Random();
            Console.WriteLine("task4");
            int[] a = new int[10];// { Aist.Next() % 500, Aist.Next() % 500, Aist.Next() % 500 };
            for (int i = 0; i < 10; i++) {
                a[i] = Aist.Next() % 500;
                Console.WriteLine(string.Format("{0}", a[i]));
            }
            Console.WriteLine("SPECBAS");
            Shake(ref a);
            for (int i = 0; i < 10; i++) {
                Console.WriteLine(string.Format("{0}", a[i]));
            }
        }

        static void Shake(ref int[] a)
        {
            Random Aist = new Random();
            for (int i = 0; i < a.Length; i++) {
                int n = Aist.Next() % a.Length;
                int q = a[i];
                a[i] = a[n];
                a[n] = q;
            }
        }

        static void task5()
        {
            Random Aist = new Random();
            Console.WriteLine("task5");
            int[] a = new int[101];// { Aist.Next() % 500, Aist.Next() % 500, Aist.Next() % 500 };
            for (int i = 0; i < 101; i++) {
                a[i] = i++;//i != 10? Aist.Next() % 100: a[Aist.Next() % 10];
            }
            a[100] = a[Aist.Next(100)];
            Shake(ref a);
             for (int i = 0; i < 101; i++) {
                //a[i] = Aist.Next() % 500;
                Console.WriteLine(string.Format( "{0}: {1}", i, a[i]));
            }
            int q, iq = -1, jq = -1;
            bool t = true;
            for (int i = 0; i < 101; i++) {
                q = a[i];
                for (int j = i + 1; j < 101; j++) {
                    if (q == a[j]) {
                        iq = i; jq = j;
                        t = false;
                        break;
                    }
                }
                if (!t) break;
            }
            Console.WriteLine(string.Format("{0} {1}", iq, jq));
        }
    }
}