14. Longest Common Prefix

.idea/.idea.Leetcode/.idea/workspace.xml

@@ -30,6 +30,7 @@
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     <projectFile>21. Merge Two Sorted Lists/21. Merge Two Sorted Lists.csproj</projectFile>
     <projectFile>217. Contains Duplicate/217. Contains Duplicate.csproj</projectFile>
+    <projectFile>225. Implement Stack using Queues/225. Implement Stack using Queues.csproj</projectFile>
     <projectFile>226. Invert Binary Tree/226. Invert Binary Tree.csproj</projectFile>
     <projectFile>231. Power of Two/231. Power of Two.csproj</projectFile>
     <projectFile>232. Implement Queue using Stacks/232. Implement Queue using Stacks.csproj</projectFile>
@@ -82,22 +83,14 @@
     <projectFile>98. Validate Binary Search Tree/98. Validate Binary Search Tree.csproj</projectFile>
     <projectFile>994. Rotting Oranges/994. Rotting Oranges.csproj</projectFile>
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+    <setting file="file://$PROJECT_DIR$/225. Implement Stack using Queues/Program.cs" root0="SKIP_HIGHLIGHTING" />
+    <setting file="file://$PROJECT_DIR$/232. Implement Queue using Stacks/MyQueue.cs" root0="SKIP_HIGHLIGHTING" />
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@@ -123,24 +126,30 @@
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@@ -375,6 +384,24 @@
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       </method>
     </configuration>
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@@ -645,6 +672,24 @@
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@@ -1581,6 +1626,11 @@
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+      <workItem from="1706644472303" duration="3045000" />
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     <servers />
   </component>

14. Longest Common Prefix/14. Longest Common Prefix.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net8.0</TargetFramework>
+        <RootNamespace>_14._Longest_Common_Prefix</RootNamespace>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>

14. Longest Common Prefix/Program.cs

@@ -0,0 +1,6 @@
+// See https://aka.ms/new-console-template for more information
+
+using _14._Longest_Common_Prefix;
+
+string[] strs = ["flower", "flow", "flight"];
+Console.WriteLine(new Solution().LongestCommonPrefix(strs));

14. Longest Common Prefix/Solution.cs

@@ -0,0 +1,32 @@
+using System.Text;
+
+namespace _14._Longest_Common_Prefix;
+
+public class Solution
+{
+    public string LongestCommonPrefix(string[] strs)
+    {
+        if (strs.Length == 1)
+            return strs[0];
+        StringBuilder sb = new StringBuilder(256);
+        int maxLen = strs.Select(s => s.Length).Min();
+        for (int i = 0; i < maxLen; i++)
+        {
+            char letter;
+            if ((letter = strs[0][i]) != strs[1][i])
+                break;
+            for (int j = 2; j < strs.Length; j++)
+            {
+                if (letter != strs[j][i])
+                {
+                    maxLen = -1;
+                    break;
+                }
+            }
+            if(maxLen != -1)
+                sb.Append(letter);
+        }
+
+        return sb.ToString();
+    }
+}

Leetcode.sln

@@ -165,6 +165,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "15. 3Sum", "15. 3Sum\15. 3S
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "225. Implement Stack using Queues", "225. Implement Stack using Queues\225. Implement Stack using Queues.csproj", "{4DF0467F-C3C9-4F92-9EE7-D21AD30F559D}"
 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
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -495,6 +497,10 @@ Global
 		{4DF0467F-C3C9-4F92-9EE7-D21AD30F559D}.Debug|Any CPU.Build.0 = Debug|Any CPU
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 		{4DF0467F-C3C9-4F92-9EE7-D21AD30F559D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E1C1A088-861F-4E6D-A3D4-631C3B207A5F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{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
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
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