feat: add rust solution to lc problem: No.0274 (#1603)

Author: xzhseh

solution/0200-0299/0274.H-Index/README.md

@@ -227,6 +227,30 @@ public:
 };
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    #[allow(dead_code)]
+    pub fn h_index(citations: Vec<i32>) -> i32 {
+        let mut citations = citations;
+        citations.sort_by(|&lhs, &rhs| {
+            rhs.cmp(&lhs)
+        });
+
+        let n = citations.len();
+
+        for i in (1..=n).rev() {
+            if citations[i - 1] >= i as i32 {
+                return i as i32;
+            }
+        }
+
+        0
+    }
+}
+```
+
 ### **Go**
 
 ```go

solution/0200-0299/0274.H-Index/README_EN.md

@@ -218,6 +218,30 @@ public:
 };
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    #[allow(dead_code)]
+    pub fn h_index(citations: Vec<i32>) -> i32 {
+        let mut citations = citations;
+        citations.sort_by(|&lhs, &rhs| {
+            rhs.cmp(&lhs)
+        });
+
+        let n = citations.len();
+
+        for i in (1..=n).rev() {
+            if citations[i - 1] >= i as i32 {
+                return i as i32;
+            }
+        }
+
+        0
+    }
+}
+```
+
 ### **Go**
 
 ```go

solution/0200-0299/0274.H-Index/Solution.rs

@@ -0,0 +1,19 @@
+impl Solution {
+    #[allow(dead_code)]
+    pub fn h_index(citations: Vec<i32>) -> i32 {
+        let mut citations = citations;
+        citations.sort_by(|&lhs, &rhs| {
+            rhs.cmp(&lhs)
+        });
+
+        let n = citations.len();
+
+        for i in (1..=n).rev() {
+            if citations[i - 1] >= i as i32 {
+                return i as i32;
+            }
+        }
+
+        0
+    }
+}