diff --git a/.idea/.idea.Leetcode/.idea/workspace.xml b/.idea/.idea.Leetcode/.idea/workspace.xml
index 0c61c7b..34f7850 100644
--- a/.idea/.idea.Leetcode/.idea/workspace.xml
+++ b/.idea/.idea.Leetcode/.idea/workspace.xml
@@ -88,9 +88,9 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="11f2de1c-1ee5-4aa4-91e6-11975ebd421f" name="Changes" comment="">
-      <change afterPath="$PROJECT_DIR$/14. Longest Common Prefix/14. Longest Common Prefix.csproj" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/14. Longest Common Prefix/Program.cs" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/14. Longest Common Prefix/Solution.cs" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/150. Evaluate Reverse Polish Notation/150. Evaluate Reverse Polish Notation.csproj" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/150. Evaluate Reverse Polish Notation/Program.cs" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/150. Evaluate Reverse Polish Notation/Solution.cs" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/.idea.Leetcode/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/.idea.Leetcode/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/Leetcode.sln" beforeDir="false" afterPath="$PROJECT_DIR$/Leetcode.sln" afterDir="false" />
     </list>
@@ -127,6 +127,7 @@
   <component name="PropertiesComponent"><![CDATA[{
   "keyToString": {
     ".NET Project.14. Longest Common Prefix.executor": "Run",
+    ".NET Project.150. Evaluate Reverse Polish Notation.executor": "Run",
     "ASKED_ADD_EXTERNAL_FILES": "true",
     "RunOnceActivity.OpenProjectViewOnStart": "true",
     "RunOnceActivity.ShowReadmeOnStart": "true",
@@ -149,7 +150,7 @@
     ]
   }
 }]]></component>
-  <component name="RunManager" selected=".NET Project.14. Longest Common Prefix">
+  <component name="RunManager" selected=".NET Project.150. Evaluate Reverse Polish Notation">
     <configuration name="101. Symmetric Tree" type="DotNetProject" factoryName=".NET Project">
       <option name="EXE_PATH" value="" />
       <option name="PROGRAM_PARAMETERS" value="" />
@@ -402,6 +403,24 @@
         <option name="Build" />
       </method>
     </configuration>
+    <configuration name="150. Evaluate Reverse Polish Notation" type="DotNetProject" factoryName=".NET Project" temporary="true">
+      <option name="EXE_PATH" value="$PROJECT_DIR$/150. Evaluate Reverse Polish Notation/bin/Debug/net8.0/150. Evaluate Reverse Polish Notation" />
+      <option name="PROGRAM_PARAMETERS" value="" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/150. Evaluate Reverse Polish Notation/bin/Debug/net8.0" />
+      <option name="PASS_PARENT_ENVS" value="1" />
+      <option name="USE_EXTERNAL_CONSOLE" value="0" />
+      <option name="USE_MONO" value="0" />
+      <option name="RUNTIME_ARGUMENTS" value="" />
+      <option name="PROJECT_PATH" value="$PROJECT_DIR$/150. Evaluate Reverse Polish Notation/150. Evaluate Reverse Polish Notation.csproj" />
+      <option name="PROJECT_EXE_PATH_TRACKING" value="1" />
+      <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
+      <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
+      <option name="PROJECT_KIND" value="DotNetCore" />
+      <option name="PROJECT_TFM" value="net8.0" />
+      <method v="2">
+        <option name="Build" />
+      </method>
+    </configuration>
     <configuration name="15. 3Sum" type="DotNetProject" factoryName=".NET Project">
       <option name="EXE_PATH" value="" />
       <option name="PROGRAM_PARAMETERS" value="" />
@@ -1628,6 +1647,7 @@
     </configuration>
     <recent_temporary>
       <list>
+        <item itemvalue=".NET Project.150. Evaluate Reverse Polish Notation" />
         <item itemvalue=".NET Project.14. Longest Common Prefix" />
       </list>
     </recent_temporary>
@@ -1642,7 +1662,7 @@
       <updated>1678030074860</updated>
       <workItem from="1678030078340" duration="114000" />
       <workItem from="1680804946367" duration="3697000" />
-      <workItem from="1706644472303" duration="3045000" />
+      <workItem from="1706644472303" duration="6672000" />
     </task>
     <servers />
   </component>
diff --git a/150. Evaluate Reverse Polish Notation/150. Evaluate Reverse Polish Notation.csproj b/150. Evaluate Reverse Polish Notation/150. Evaluate Reverse Polish Notation.csproj
new file mode 100644
index 0000000..2eb755f
--- /dev/null
+++ b/150. Evaluate Reverse Polish Notation/150. Evaluate Reverse Polish Notation.csproj	
@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net8.0</TargetFramework>
+        <RootNamespace>_150._Evaluate_Reverse_Polish_Notation</RootNamespace>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>
diff --git a/150. Evaluate Reverse Polish Notation/Program.cs b/150. Evaluate Reverse Polish Notation/Program.cs
new file mode 100644
index 0000000..6df972f
--- /dev/null
+++ b/150. Evaluate Reverse Polish Notation/Program.cs	
@@ -0,0 +1,11 @@
+// See https://aka.ms/new-console-template for more information
+
+using _150._Evaluate_Reverse_Polish_Notation;
+
+string[] arr = ["10", "1", "1", "2", "+", "+", "+"];
+var sol = new Solution();
+int n = 100000;
+while(n-- > 0)
+    Console.WriteLine(sol.EvalRPN(["10", "1", "1", "2", "+", "+", "+"]));
+
+    
\ No newline at end of file
diff --git a/150. Evaluate Reverse Polish Notation/Solution.cs b/150. Evaluate Reverse Polish Notation/Solution.cs
new file mode 100644
index 0000000..6c66880
--- /dev/null
+++ b/150. Evaluate Reverse Polish Notation/Solution.cs	
@@ -0,0 +1,31 @@
+namespace _150._Evaluate_Reverse_Polish_Notation;
+
+public class Solution
+{
+    public int EvalRPN(string[] tokens)
+    {
+        var stack = new Stack<int>(tokens.Length);
+        foreach (var token in tokens)
+        {
+            if (int.TryParse(token, out var number))
+                stack.Push(number);
+            else
+            {
+                int right = stack.Pop();
+                int left = stack.Pop();
+                char op = token[0];
+                stack.Push(Calc(op, left, right));
+            }
+        }
+        return stack.Pop();
+    }
+
+    private int Calc(char op, int left, int right) => op switch
+    {
+        '+' => left + right,
+        '-' => left - right,
+        '*' => left * right,
+        '/' => left / right,
+        _ => throw new ArgumentOutOfRangeException()
+    };
+}
\ No newline at end of file
diff --git a/Leetcode.sln b/Leetcode.sln
index b20c052..06bdebe 100644
--- a/Leetcode.sln
+++ b/Leetcode.sln
@@ -167,6 +167,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "225. Implement Stack using
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "14. Longest Common Prefix", "14. Longest Common Prefix\14. Longest Common Prefix.csproj", "{E1C1A088-861F-4E6D-A3D4-631C3B207A5F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "150. Evaluate Reverse Polish Notation", "150. Evaluate Reverse Polish Notation\150. Evaluate Reverse Polish Notation.csproj", "{10A95EED-FD1D-40E7-B9E0-2DD48BE05AB9}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -501,6 +503,10 @@ Global
 		{E1C1A088-861F-4E6D-A3D4-631C3B207A5F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{E1C1A088-861F-4E6D-A3D4-631C3B207A5F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E1C1A088-861F-4E6D-A3D4-631C3B207A5F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{10A95EED-FD1D-40E7-B9E0-2DD48BE05AB9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{10A95EED-FD1D-40E7-B9E0-2DD48BE05AB9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{10A95EED-FD1D-40E7-B9E0-2DD48BE05AB9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{10A95EED-FD1D-40E7-B9E0-2DD48BE05AB9}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE