feat: add rust solution to lc problem: No.0168 (#1502)

Author: xzhseh

solution/0100-0199/0168.Excel Sheet Column Title/README.md

@@ -98,6 +98,32 @@ class Solution {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    #[allow(dead_code)]
+    pub fn convert_to_title(column_number: i32) -> String {
+        let mut ret = String::from("");
+        let mut column_number = column_number;
+
+        while column_number > 0 {
+            if column_number <= 26 {
+                ret.push(('A' as u8 + column_number as u8 - 1) as char);
+                break;
+            } else {
+                let mut left = column_number % 26;
+                left = if left == 0 { 26 } else { left };
+                ret.push(('A' as u8 + left as u8 - 1) as char);
+                column_number = (column_number - 1) / 26;
+            }
+        }
+
+        ret.chars().rev().collect()
+    }
+}
+```
+
 ### **TypeScript**
 
 ```ts

solution/0100-0199/0168.Excel Sheet Column Title/README_EN.md

@@ -81,6 +81,32 @@ class Solution {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    #[allow(dead_code)]
+    pub fn convert_to_title(column_number: i32) -> String {
+        let mut ret = String::from("");
+        let mut column_number = column_number;
+
+        while column_number > 0 {
+            if column_number <= 26 {
+                ret.push(('A' as u8 + column_number as u8 - 1) as char);
+                break;
+            } else {
+                let mut left = column_number % 26;
+                left = if left == 0 { 26 } else { left };
+                ret.push(('A' as u8 + left as u8 - 1) as char);
+                column_number = (column_number - 1) / 26;
+            }
+        }
+
+        ret.chars().rev().collect()
+    }
+}
+```
+
 ### **TypeScript**
 
 ```ts

solution/0100-0199/0168.Excel Sheet Column Title/Solution.rs

@@ -0,0 +1,21 @@
+impl Solution {
+    #[allow(dead_code)]
+    pub fn convert_to_title(column_number: i32) -> String {
+        let mut ret = String::from("");
+        let mut column_number = column_number;
+
+        while column_number > 0 {
+            if column_number <= 26 {
+                ret.push(('A' as u8 + column_number as u8 - 1) as char);
+                break;
+            } else {
+                let mut left = column_number % 26;
+                left = if left == 0 { 26 } else { left };
+                ret.push(('A' as u8 + left as u8 - 1) as char);
+                column_number = (column_number - 1) / 26;
+            }
+        }
+
+        ret.chars().rev().collect()
+    }
+}