feat: add solutions to lc problem: No.2129 (doocs#2431)

No.2129.Capitalize the Title

Author: yanglbme

solution/2100-2199/2129.Capitalize the Title/README.md

@@ -96,7 +96,9 @@ public:
         istringstream ss(title);
         string ans;
         while (ss >> title) {
-            if (title.size() > 2) title[0] = toupper(title[0]);
+            if (title.size() > 2) {
+                title[0] = toupper(title[0]);
+            }
             ans += title;
             ans += " ";
         }
@@ -119,26 +121,6 @@ func capitalizeTitle(title string) string {
 }
 ```
 
-```ts
-function capitalizeTitle(title: string): string {
-    const ans: string[] = [];
-    for (const s of title.split(' ')) {
-        if (s.length < 3) {
-            ans.push(s.toLowerCase());
-        } else {
-            ans.push(s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase());
-        }
-    }
-    return ans.join(' ');
-}
-```
-
-<!-- tabs:end -->
-
-### 方法二
-
-<!-- tabs:start -->
-
 ```ts
 function capitalizeTitle(title: string): string {
     return title
@@ -152,6 +134,22 @@ function capitalizeTitle(title: string): string {
 }
 ```
 
+```cs
+public class Solution {
+    public string CapitalizeTitle(string title) {
+        List<string> ans = new List<string>();
+        foreach (string s in title.Split(' ')) {
+            if (s.Length < 3) {
+                ans.Add(s.ToLower());
+            } else {
+                ans.Add(char.ToUpper(s[0]) + s.Substring(1).ToLower());
+            }
+        }
+        return string.Join(" ", ans);
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- end -->

solution/2100-2199/2129.Capitalize the Title/README_EN.md

@@ -56,7 +56,11 @@ The remaining words have a length of at least 3, so the first letter of each rem
 
 ## Solutions
 
-### Solution 1
+### Solution 1: Simulation
+
+Directly simulate the process. Split the string by spaces to get each word, then convert each word to the appropriate case as per the problem statement. Finally, join the words with spaces.
+
+The time complexity is $O(n)$, and the space complexity is $O(n)$, where $n$ is the length of the string `title`.
 
 <!-- tabs:start -->
 
@@ -91,7 +95,9 @@ public:
         istringstream ss(title);
         string ans;
         while (ss >> title) {
-            if (title.size() > 2) title[0] = toupper(title[0]);
+            if (title.size() > 2) {
+                title[0] = toupper(title[0]);
+            }
             ans += title;
             ans += " ";
         }
@@ -114,39 +120,33 @@ func capitalizeTitle(title string) string {
 }
 ```
 
-```ts
-function capitalizeTitle(title: string): string {
-    const ans: string[] = [];
-    for (const s of title.split(' ')) {
-        if (s.length < 3) {
-            ans.push(s.toLowerCase());
-        } else {
-            ans.push(s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase());
-        }
-    }
-    return ans.join(' ');
-}
-```
-
-<!-- tabs:end -->
-
-### Solution 2
-
-<!-- tabs:start -->
-
 ```ts
 function capitalizeTitle(title: string): string {
     return title
         .split(' ')
         .map(s =>
-            s.length < 3
-                ? s.toLowerCase()
-                : s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase(),
+            s.length < 3 ? s.toLowerCase() : s.slice(0, 1).toUpperCase() + s.slice(1).toLowerCase(),
         )
         .join(' ');
 }
 ```
 
+```cs
+public class Solution {
+    public string CapitalizeTitle(string title) {
+        List<string> ans = new List<string>();
+        foreach (string s in title.Split(' ')) {
+            if (s.Length < 3) {
+                ans.Add(s.ToLower());
+            } else {
+                ans.Add(char.ToUpper(s[0]) + s.Substring(1).ToLower());
+            }
+        }
+        return string.Join(" ", ans);
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- end -->

solution/2100-2199/2129.Capitalize the Title/Solution.cpp

@@ -5,7 +5,9 @@ class Solution {
         istringstream ss(title);
         string ans;
         while (ss >> title) {
-            if (title.size() > 2) title[0] = toupper(title[0]);
+            if (title.size() > 2) {
+                title[0] = toupper(title[0]);
+            }
             ans += title;
             ans += " ";
         }

solution/2100-2199/2129.Capitalize the Title/Solution.cs

@@ -0,0 +1,13 @@
+public class Solution {
+    public string CapitalizeTitle(string title) {
+        List<string> ans = new List<string>();
+        foreach (string s in title.Split(' ')) {
+            if (s.Length < 3) {
+                ans.Add(s.ToLower());
+            } else {
+                ans.Add(char.ToUpper(s[0]) + s.Substring(1).ToLower());
+            }
+        }
+        return string.Join(" ", ans);
+    }
+}

solution/2100-2199/2129.Capitalize the Title/Solution.ts

@@ -1,11 +1,8 @@
 function capitalizeTitle(title: string): string {
-    const ans: string[] = [];
-    for (const s of title.split(' ')) {
-        if (s.length < 3) {
-            ans.push(s.toLowerCase());
-        } else {
-            ans.push(s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase());
-        }
-    }
-    return ans.join(' ');
+    return title
+        .split(' ')
+        .map(s =>
+            s.length < 3 ? s.toLowerCase() : s.slice(0, 1).toUpperCase() + s.slice(1).toLowerCase(),
+        )
+        .join(' ');
 }