Added realisation

C#/forSpbu/FindPair/FindPair.csproj

@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>WinExe</OutputType>
+        <TargetFramework>net7.0-windows</TargetFramework>
+        <Nullable>enable</Nullable>
+        <UseWindowsForms>true</UseWindowsForms>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <RootNamespace>FindPare</RootNamespace>
+    </PropertyGroup>
+
+</Project>

C#/forSpbu/FindPair/FindPare.csproj.user

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Compile Update="Form1.cs">
+      <SubType>Form</SubType>
+    </Compile>
+  </ItemGroup>
+</Project>

C#/forSpbu/FindPair/GameCore.cs

@@ -0,0 +1,100 @@
+namespace FindPare;
+
+public class GameCore
+{
+    enum State
+    {
+        firstButtonPressed,
+        secondButtonPressed
+    }
+    public GameCore(int fieldSize)
+    {
+        _field = new int[fieldSize][];
+        for (int i = 0; i < fieldSize; i++)
+        {
+            _field[i] = new int[fieldSize];
+        }
+        _isOpened = new bool[fieldSize][];
+        for (int i = 0; i < fieldSize; i++)
+        {
+            _isOpened[i] = new bool[fieldSize];
+        }
+        _dimensionSize = fieldSize;
+        _state = State.secondButtonPressed;
+        RandomiseField();
+    }
+
+    private void RandomiseField()
+    {
+        var cellValues = new List<int>(Enumerable.Range(0, _dimensionSize * _dimensionSize / 2));
+        cellValues.AddRange(Enumerable.Range(0, _dimensionSize * _dimensionSize / 2));
+        var random = new Random();
+        for (var i = 0; i < _dimensionSize; i++)
+        {
+            for (int j = 0; j < _dimensionSize; j++)
+            {
+                var nextValueIndex = random.Next(cellValues.Count);
+                _field[i][j] = cellValues[nextValueIndex];
+                cellValues.RemoveAt(nextValueIndex);
+            }
+        }
+
+    }
+
+    public int GetValue(int firstIndex, int secondIndex)
+    {
+        if (firstIndex < 0 || firstIndex >= _field.Length)
+        {
+            throw new ArgumentOutOfRangeException(nameof(firstIndex));
+        }
+
+        if (secondIndex < 0 || secondIndex >= _field[0].Length)
+        {
+            throw new ArgumentOutOfRangeException(nameof(secondIndex));
+        }
+        return _field[firstIndex][secondIndex];
+    }
+
+    public bool IsCellOpened(int firstIndex, int secondIndex)
+    {
+        if (firstIndex < 0 || firstIndex >= _isOpened.Length)
+        {
+            throw new ArgumentOutOfRangeException(nameof(firstIndex));
+        }
+
+        if (secondIndex < 0 || secondIndex >= _isOpened[0].Length)
+        {
+            throw new ArgumentOutOfRangeException(nameof(secondIndex));
+        }
+        return _isOpened[firstIndex][secondIndex];
+    }
+
+    public bool OpenCell(int index)
+    {
+        switch (_state)
+        {
+            case State.firstButtonPressed:
+                int rowIndex = index % _dimensionSize;
+                var currentCell = (rowIndex, index - rowIndex * _dimensionSize);
+                if (_field[_lastOpened.Item1][_lastOpened.Item2] == _field[currentCell.Item1][currentCell.Item2])
+                {
+                    return true;
+                }
+
+                return false;
+            case State.secondButtonPressed:
+                int firstIndex = index % _dimensionSize;
+                _lastOpened = (firstIndex, index - firstIndex * _dimensionSize);
+                return true;
+            default:
+                throw new ArgumentOutOfRangeException(nameof(_state));
+        }
+    }
+
+    private State _state;
+
+    private (int, int) _lastOpened;
+    private readonly int[][] _field;
+    private readonly bool[][] _isOpened;
+    private readonly int _dimensionSize;
+}

C#/forSpbu/FindPair/GameForm.cs

@@ -0,0 +1,32 @@
+namespace FindPare;
+
+public partial class GameForm : Form
+{
+    public GameForm(int fieldSize)
+    {
+        _gameCore = new GameCore(fieldSize);
+        InitializeComponent(fieldSize);
+    }
+
+    private void CellOnClick(object sender, EventArgs eventArgs)
+    {
+        if (sender is not Button senderButton)
+        {
+            return;
+        }
+        if (senderButton.Tag is not string indexString)
+        {
+            return;
+        } 
+        int index = int.Parse(indexString);
+        var coordinate = (index % fieldSize, index - (index % fieldSize) * fieldSize);
+        if (_gameCore.OpenCell(index))
+        {
+            senderButton.Text = _gameCore.GetValue(coordinate.Item1, coordinate.Item2);
+        }
+
+    }
+
+    private Button lastOpenedButton;
+    private readonly GameCore _gameCore;
+}

C#/forSpbu/FindPair/Program.cs

@@ -0,0 +1,31 @@
+namespace FindPare;
+
+static class Program
+{
+    /// <summary>
+    ///  The main entry point for the application.
+    /// </summary>
+    [STAThread]
+    static void Main(string[] args)
+    {
+        if (args.Length != 1)
+        {
+            Console.WriteLine("Incorrect number of program args");
+            return;
+        }
+        if (!int.TryParse(args[0], out var fieldSize))
+        {
+            Console.WriteLine("Error in parsing fieldSize, incorrect program parameter");
+            return;
+        }
+
+        if (fieldSize <= 0 || fieldSize % 2 == 1)
+        {
+            Console.WriteLine("Incorrect program parameter, should be > 0 and % 2 == 0");
+            return;
+        }
+
+        ApplicationConfiguration.Initialize();
+        Application.Run(new GameForm(fieldSize));
+    }
+}

C#/forSpbu/forSpbu.sln

@@ -10,6 +10,10 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "03.03", "03.03", "{882A9B9C
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "10.03", "10.03", "{EA6FC7D9-BDFB-49CD-AC00-FC5DDC5274B0}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Exam", "Exam", "{75E71CEE-F374-4770-87E9-93D96DFBBED0}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FindPair", "FindPair\FindPair.csproj", "{EC7B9564-86F4-4F50-BB4D-D2A1DA0F8430}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -21,12 +25,17 @@ Global
 		{E007586F-9760-4744-BB25-EDEFD6BA860C}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E007586F-9760-4744-BB25-EDEFD6BA860C}.Release|Any CPU.Build.0 = Release|Any CPU
 		{A4F6ADD5-85FD-4F67-8B29-549DDDF6F82E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-       	{A4F6ADD5-85FD-4F67-8B29-549DDDF6F82E}.Debug|Any CPU.Build.0 = Debug|Any CPU
-       	{A4F6ADD5-85FD-4F67-8B29-549DDDF6F82E}.Release|Any CPU.ActiveCfg = Release|Any CPU
-       	{A4F6ADD5-85FD-4F67-8B29-549DDDF6F82E}.Release|Any CPU.Build.0 = Release|Any CPU
+								{A4F6ADD5-85FD-4F67-8B29-549DDDF6F82E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+								{A4F6ADD5-85FD-4F67-8B29-549DDDF6F82E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+								{A4F6ADD5-85FD-4F67-8B29-549DDDF6F82E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EC7B9564-86F4-4F50-BB4D-D2A1DA0F8430}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EC7B9564-86F4-4F50-BB4D-D2A1DA0F8430}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EC7B9564-86F4-4F50-BB4D-D2A1DA0F8430}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EC7B9564-86F4-4F50-BB4D-D2A1DA0F8430}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
-	    {E007586F-9760-4744-BB25-EDEFD6BA860C} = {D3FCB669-E93F-4F0B-B9C5-6592CE93AC7F}
+					{E007586F-9760-4744-BB25-EDEFD6BA860C} = {D3FCB669-E93F-4F0B-B9C5-6592CE93AC7F}
 		{A4F6ADD5-85FD-4F67-8B29-549DDDF6F82E} = {D3FCB669-E93F-4F0B-B9C5-6592CE93AC7F}
+		{EC7B9564-86F4-4F50-BB4D-D2A1DA0F8430} = {75E71CEE-F374-4770-87E9-93D96DFBBED0}
 	EndGlobalSection
 EndGlobal