feat: add rust solution to lc problem: No.1984

No.1984.Minimum Difference Between Highest and Lowest of K Scores

Author: YangFong

solution/1900-1999/1984.Minimum Difference Between Highest and Lowest of K Scores/README.md

@@ -129,6 +129,22 @@ func min(a, b int) int {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn minimum_difference(mut nums: Vec<i32>, k: i32) -> i32 {
+        nums.sort();
+        let k = k as usize;
+        let mut res = i32::MAX;
+        for i in 0..=nums.len() - k {
+            res = res.min(nums[i + k - 1] - nums[i]);
+        }
+        res
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1900-1999/1984.Minimum Difference Between Highest and Lowest of K Scores/README_EN.md

@@ -120,6 +120,22 @@ func min(a, b int) int {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn minimum_difference(mut nums: Vec<i32>, k: i32) -> i32 {
+        nums.sort();
+        let k = k as usize;
+        let mut res = i32::MAX;
+        for i in 0..=nums.len() - k {
+            res = res.min(nums[i + k - 1] - nums[i]);
+        }
+        res
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1900-1999/1984.Minimum Difference Between Highest and Lowest of K Scores/Solution.rs

@@ -0,0 +1,11 @@
+impl Solution {
+    pub fn minimum_difference(mut nums: Vec<i32>, k: i32) -> i32 {
+        nums.sort();
+        let k = k as usize;
+        let mut res = i32::MAX;
+        for i in 0..=nums.len() - k {
+            res = res.min(nums[i + k - 1] - nums[i]);
+        }
+        res
+    }
+}