diff --git a/Lab3/Lab3.csproj b/Lab3/Lab3.csproj
new file mode 100644
index 0000000..74abf5c
--- /dev/null
+++ b/Lab3/Lab3.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/Lab3/Program.cs b/Lab3/Program.cs
new file mode 100644
index 0000000..afac41d
--- /dev/null
+++ b/Lab3/Program.cs
@@ -0,0 +1,108 @@
+using System.Reflection.Metadata.Ecma335;
+
+namespace Lab3
+{
+    internal class Program
+    {
+        public static long methodToAnalysis1(int[] arr)
+        {
+            long n = arr.Length;
+            long k = n;
+
+            for (int i = 0; i < n; i++)
+            {
+                if (arr[i] / 7 == 0)
+                {
+                    k -= 2;
+                }
+                else
+                {
+                    k += 3;
+                }
+
+            }
+
+            if (arr[0] > 0)
+            {
+                for (int i = 0; i < n * n; i++)
+                {
+                    if (arr[0] > 0)
+                    {
+                        k += 3;
+                    }
+                }
+            }
+
+            return k;
+        }
+
+        public static long methodToAnalysis2(int n, int[] arr)
+        {
+            long k = 0;
+
+            for (int i = 0; i < n; i++)
+            {
+                k += arr[i] + FF4(i, arr);
+            }
+
+            return k;
+        }
+
+        public static long FF4(int n, int[] arr)
+        {
+            if (n > 0 && arr.Length > n && arr[n] < 0)
+            {
+                return FF4(n / 2, arr) + FF4(n / 3, arr);
+            }
+
+            return n;
+        }
+
+        public static int knapsack(int weightLimit, int n, int[] weights, int[] values)
+        {
+            if (n == 1)
+            {
+                return weights[0] <= weightLimit ? values[0] : 0;
+            }
+            if (weights[n - 1] > weightLimit)
+            {
+                return knapsack(weightLimit, n - 1, weights, values);
+            }
+
+            int case1 = knapsack(weightLimit - weights[n - 1], n - 1, weights, values) + values[n - 1];
+            int case2 = knapsack(weightLimit, n - 1, weights, values);
+            return Math.Max(case1, case2);
+        }
+
+        public static int knapsackDP(int weightLimit, int n, int[] weights, int[] values)
+        {
+            int[,] memo = new int[n + 1, weightLimit +1];
+            for (int i = 1; i <= n; i++)
+            {
+                for (int w = 1; w <= weightLimit; w++)
+                {
+                    if (weights[i-1] <= w)
+                    {
+                        memo[i, w] = Math.Max(values[i - 1] + memo[i - 1, w - weights[i - 1]], memo[i - 1, w]);
+                    }
+                    else
+                    {
+                        memo[i, w] = memo[i - 1, w];
+                    }
+                }
+            }
+
+            return memo[n, weightLimit];
+        }
+
+        static void Main(string[] args)
+        {
+            int weightLimit = 15;
+            int[] weights = new int[]{ 7, 2, 1, 9 };
+            int[] values  = new int[]{ 5, 4, 7, 2 };
+            int n = weights.Length;
+            Console.WriteLine(knapsackDP(weightLimit, n, weights, values));
+            Console.WriteLine(knapsack(weightLimit, n, weights, values));
+        }
+    }
+}
\ No newline at end of file
diff --git a/Labs.sln b/Labs.sln
index 78fd219..0eb9884 100644
--- a/Labs.sln
+++ b/Labs.sln
@@ -5,7 +5,9 @@ VisualStudioVersion = 17.1.32328.378
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Lab1", "Lab1\Lab1.csproj", "{497767A1-722A-4F48-86E5-C2AE6E0B9C9A}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lab2", "Lab2\Lab2.csproj", "{6AF5D775-08B9-4D4F-9E2E-116C551D0581}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Lab2", "Lab2\Lab2.csproj", "{6AF5D775-08B9-4D4F-9E2E-116C551D0581}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lab3", "Lab3\Lab3.csproj", "{C3128C1D-C1F7-476A-808F-1A3FE5E848FA}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -21,6 +23,10 @@ Global
 		{6AF5D775-08B9-4D4F-9E2E-116C551D0581}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{6AF5D775-08B9-4D4F-9E2E-116C551D0581}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{6AF5D775-08B9-4D4F-9E2E-116C551D0581}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C3128C1D-C1F7-476A-808F-1A3FE5E848FA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C3128C1D-C1F7-476A-808F-1A3FE5E848FA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C3128C1D-C1F7-476A-808F-1A3FE5E848FA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C3128C1D-C1F7-476A-808F-1A3FE5E848FA}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE