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  1.  
  2.  
  3.     using System;
  4.  
  5.     namespace For39262
  6.     {
  7.         internal class Program
  8.         {
  9.             private static void Main(string[] args)
  10.             {
  11.                 Console.WriteLine("Here we go...");
  12.  
  13.                 int[] A = new[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
  14.                 int K = 3;
  15.  
  16.                 TaskNo1 taskNo1 = new TaskNo1(A, K);
  17.  
  18.                 try
  19.                 {
  20.                     int[] result = taskNo1.GetResult();
  21.                     for (int i = 0; i < result.Length; i++)
  22.                     {
  23.                         Console.WriteLine(result[i]);
  24.                     }
  25.                     Console.WriteLine("Extracted elements: "
  26.                                       + result.Length + "/" + A.Length);
  27.                 }
  28.                 catch (TaskException ex)
  29.                 {
  30.                     Console.WriteLine(ex.Message);
  31.                 }
  32.  
  33.                 Console.Read();
  34.             }
  35.  
  36.             public class TaskNo1
  37.             {
  38.                 public readonly int[] A;
  39.                 public readonly int N;
  40.                 public readonly int K;
  41.  
  42.                 public TaskNo1(int[] a, int k)
  43.                 {
  44.                     A = a;
  45.                     K = k;
  46.                     N = A.Length;
  47.                 }
  48.  
  49.                 public int[] GetResult()
  50.                 {
  51.                     // Проверка уловия для K
  52.                     if (!IsInitialСonditionsSatisfied())
  53.                         throw new TaskException("K is wrong");
  54.  
  55.                     // Определение длины массива для результата
  56.                     int lengthOfResult = 0;
  57.                     for (int i = 1; i <= N; i++)
  58.                     {
  59.                         if (isAmultipleFor(i, K))
  60.                         {
  61.                             lengthOfResult++;
  62.                         }
  63.                     }
  64.  
  65.                     int[] result = new int[lengthOfResult];
  66.  
  67.                     // Заполнение массива резульатами
  68.                     int resultCounter = 0;
  69.                     for (int i = 1; i <= N; i++)
  70.                     {
  71.                         if (isAmultipleFor(i, K))
  72.                         {
  73.                             int realIndex = i - 1;
  74.                             result[resultCounter] = A[realIndex];
  75.                             resultCounter++;
  76.                         }
  77.                     }
  78.  
  79.                     return result;
  80.                 }
  81.  
  82.                 public bool IsInitialСonditionsSatisfied()
  83.                 {
  84.                     if (K < 1)
  85.                         return false;
  86.  
  87.                     if (K > N)
  88.                         return false;
  89.  
  90.                     return true;
  91.                 }
  92.  
  93.                 public bool isAmultipleFor(int a, int b)
  94.                 {
  95.                     return a % b == 0;
  96.                 }
  97.             }
  98.  
  99.             internal class TaskException : ApplicationException
  100.             {
  101.                 public TaskException(string message)
  102.                     : base(message)
  103.                 {
  104.                 }
  105.             }
  106.         }
  107.     }
  108.  
  109.  
Success #stdin #stdout 0.04s 33912KB
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stdin
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Standard input is empty
stdout
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Here we go...
3
6
9
12
Extracted elements: 4/12
https://ideone.com/WqgKOt
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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