feat: add solutions to lc problem: No.0071 (doocs#658)

Author: YangFong

solution/0000-0099/0071.Simplify Path/README.md

@@ -140,6 +140,92 @@ func simplifyPath(path string) string {
 }
 ```
 
+### **C#**
+
+```cs
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+public class Solution {
+    public string SimplifyPath(string path) {
+        var stack = new Stack<string>();
+        var sb = new StringBuilder();
+        foreach (var ch in ((IEnumerable<char>)path).Concat(Enumerable.Repeat('/', 1)))
+        {
+            if (ch == '/')
+            {
+                if (sb.Length > 0)
+                {
+                    var folder = sb.ToString();
+                    sb.Clear();
+                    switch (folder)
+                    {
+                        case ".":
+                            break;
+                        case "..":
+                            if (stack.Any())
+                            {
+                                stack.Pop();
+                            }
+                            break;
+                        default:
+                            stack.Push(folder);
+                            break;
+                    }
+                }
+            }
+            else
+            {
+                sb.Append(ch);
+            }
+        }
+        
+        if (stack.Count == 0)
+        {
+            sb.Append('/');
+        }
+        foreach (var folder in ((IEnumerable<string>)stack.ToList()).Reverse())
+        {
+            sb.Append('/');
+            sb.Append(folder);
+        }
+        return sb.ToString();
+    }
+}
+```
+
+### **TypeScript**
+
+```ts
+function simplifyPath(path: string): string {
+    // 添加辅助斜线
+    path += "/";
+
+    const stack = [];
+    let str = "";
+    for (let i = 1; i < path.length; i++) {
+        const c = path[i];
+        if (c === "/") {
+            if (str !== "" && str !== ".") {
+                if (str === "..") {
+                    if (stack.length !== 0) {
+                        stack.pop();
+                    }
+                } else {
+                    stack.push(str);
+                }
+            }
+            str = "";
+        } else {
+            str += c;
+        }
+    }
+
+    return "/" + stack.join("/");
+}
+```
+
 ### **...**
 
 ```

solution/0000-0099/0071.Simplify Path/README_EN.md

@@ -131,6 +131,92 @@ func simplifyPath(path string) string {
 }
 ```
 
+### **C#**
+
+```cs
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+public class Solution {
+    public string SimplifyPath(string path) {
+        var stack = new Stack<string>();
+        var sb = new StringBuilder();
+        foreach (var ch in ((IEnumerable<char>)path).Concat(Enumerable.Repeat('/', 1)))
+        {
+            if (ch == '/')
+            {
+                if (sb.Length > 0)
+                {
+                    var folder = sb.ToString();
+                    sb.Clear();
+                    switch (folder)
+                    {
+                        case ".":
+                            break;
+                        case "..":
+                            if (stack.Any())
+                            {
+                                stack.Pop();
+                            }
+                            break;
+                        default:
+                            stack.Push(folder);
+                            break;
+                    }
+                }
+            }
+            else
+            {
+                sb.Append(ch);
+            }
+        }
+        
+        if (stack.Count == 0)
+        {
+            sb.Append('/');
+        }
+        foreach (var folder in ((IEnumerable<string>)stack.ToList()).Reverse())
+        {
+            sb.Append('/');
+            sb.Append(folder);
+        }
+        return sb.ToString();
+    }
+}
+```
+
+### **TypeScript**
+
+```ts
+function simplifyPath(path: string): string {
+    // 添加辅助斜线
+    path += "/";
+
+    const stack = [];
+    let str = "";
+    for (let i = 1; i < path.length; i++) {
+        const c = path[i];
+        if (c === "/") {
+            if (str !== "" && str !== ".") {
+                if (str === "..") {
+                    if (stack.length !== 0) {
+                        stack.pop();
+                    }
+                } else {
+                    stack.push(str);
+                }
+            }
+            str = "";
+        } else {
+            str += c;
+        }
+    }
+
+    return "/" + stack.join("/");
+}
+```
+
 ### **...**
 
 ```

solution/0000-0099/0071.Simplify Path/Solution.ts

@@ -0,0 +1,26 @@
+function simplifyPath(path: string): string {
+    // 添加辅助斜线
+    path += "/";
+
+    const stack = [];
+    let str = "";
+    for (let i = 1; i < path.length; i++) {
+        const c = path[i];
+        if (c === "/") {
+            if (str !== "" && str !== ".") {
+                if (str === "..") {
+                    if (stack.length !== 0) {
+                        stack.pop();
+                    }
+                } else {
+                    stack.push(str);
+                }
+            }
+            str = "";
+        } else {
+            str += c;
+        }
+    }
+
+    return "/" + stack.join("/");
+}