Anul 3 Semestrul 1

2025-02-06 20:33:26 +02:00
parent 0b130ee18c
commit 184f3bd92e
313 changed files with 348499 additions and 0 deletions
@@ -0,0 +1,110 @@
+using System;
+using MPI;
+
+
+//mpiexec -n 4 ProjectDistributed.exe
+
+class GraphColoringProblem
+{
+    const int V = 4;
+
+    static bool IsSafe(int v, bool[,] graph, int[] color, int c)
+    {
+        for (int i = 0; i < V; i++)
+        {
+            if (graph[v, i] && c == color[i])
+                return false;
+        }
+        return true;
+    }
+
+    static bool GraphColoringUtil(bool[,] graph, int m, int[] color, int v)
+    {
+        if (v == V)
+            return true;
+
+        for (int c = 1; c <= m; c++)
+        {
+            if (IsSafe(v, graph, color, c))
+            {
+                color[v] = c;
+
+                if (GraphColoringUtil(graph, m, color, v + 1))
+                    return true;
+
+                color[v] = 0;
+            }
+        }
+        return false;
+    }
+
+    static bool SolveGraphColoring(bool[,] graph, int m, int rank, int size, out int[] colors)
+    {
+        int[] color = new int[V];
+        Array.Fill(color, 0);
+
+        bool foundSolution = false;
+        for (int c = rank + 1; c <= m; c += size)
+        {
+            color[0] = c; // Assign a color to the first vertex based on process rank
+
+            if (GraphColoringUtil(graph, m, color, 1))
+            {
+                foundSolution = true;
+                break;
+            }
+        }
+        colors = color;
+        return foundSolution;
+    }
+
+    static void PrintSolution(int[] color)
+    {
+        Console.WriteLine("Solution Exists: Following are the assigned colors");
+        for (int i = 0; i < V; i++)
+            Console.Write($" {color[i]} ");
+        Console.WriteLine();
+    }
+
+    static void Main(string[] args)
+    {
+        using (new MPI.Environment(ref args))
+        {
+            Intracommunicator comm = Communicator.world;
+            int rank = comm.Rank;
+            int size = comm.Size;
+
+            bool[,] graph = {
+                { false, true, true, true },
+                { true, false, true, false },
+                { true, true, false, true },
+                { true, false, true, false }
+            };
+
+            int m = 3; // Number of colors
+
+            
+
+            bool localSolution = SolveGraphColoring(graph, m, rank, size, out int[] colors);
+            (bool foundSolution, int[] solution) = comm.Allreduce(
+                (localSolution, colors),
+                (sol1, sol2) => sol1.Item1 ? sol1 : sol2
+            );
+
+            //bool globalSolution = comm.Reduce(localSolution, Operation<bool>.LogicalOr, 0);
+            if (rank == 0)
+            {
+                if (!foundSolution)
+                {
+                    Console.WriteLine("No solution exists.");
+                }
+                else
+                {
+                    Console.WriteLine("A solution has been found by one of the processes.");
+
+                    PrintSolution(solution);
+                }
+            }
+        }
+    }
+}
@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="MPI.NET" Version="1.4.0" />
+  </ItemGroup>
+
+</Project>