feat: add rust solution to lc problem: No.3304 (#4542)

No.3304.Find the K-th Character in String Game I

Author: yanglbme

solution/3300-3399/3304.Find the K-th Character in String Game I/README.md

@@ -163,6 +163,23 @@ function kthCharacter(k: number): string {
 }
 ```
 
+#### Rust
+
+```rust
+impl Solution {
+    pub fn kth_character(k: i32) -> char {
+        let mut word = vec![0];
+        while word.len() < k as usize {
+            let m = word.len();
+            for i in 0..m {
+                word.push((word[i] + 1) % 26);
+            }
+        }
+        (b'a' + word[(k - 1) as usize] as u8) as char
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/3300-3399/3304.Find the K-th Character in String Game I/README_EN.md

@@ -161,6 +161,23 @@ function kthCharacter(k: number): string {
 }
 ```
 
+#### Rust
+
+```rust
+impl Solution {
+    pub fn kth_character(k: i32) -> char {
+        let mut word = vec![0];
+        while word.len() < k as usize {
+            let m = word.len();
+            for i in 0..m {
+                word.push((word[i] + 1) % 26);
+            }
+        }
+        (b'a' + word[(k - 1) as usize] as u8) as char
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/3300-3399/3304.Find the K-th Character in String Game I/Solution.rs

@@ -0,0 +1,12 @@
+impl Solution {
+    pub fn kth_character(k: i32) -> char {
+        let mut word = vec![0];
+        while word.len() < k as usize {
+            let m = word.len();
+            for i in 0..m {
+                word.push((word[i] + 1) % 26);
+            }
+        }
+        (b'a' + word[(k - 1) as usize] as u8) as char
+    }
+}